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1022020011 = 3417970489
BaseRepresentation
bin111100111010101…
…100100110101011
32122020002222220000
4330322230212223
54043114120021
6245225234043
734220012115
oct7472544653
92566088800
101022020011
114849a3841
12246332923
13133979b8c
1499a403b5
155ead0b26
hex3ceac9ab

1022020011 has 20 divisors (see below), whose sum is σ = 1535272200. Its totient is φ = 677530656.

The previous prime is 1022020009. The next prime is 1022020037. The reversal of 1022020011 is 1100202201.

It is not a de Polignac number, because 1022020011 - 21 = 1022020009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1022019975 and 1022020002.

It is not an unprimeable number, because it can be changed into a prime (1022020711) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 20746 + ... + 49743.

It is an arithmetic number, because the mean of its divisors is an integer number (76763610).

Almost surely, 21022020011 is an apocalyptic number.

1022020011 is a deficient number, since it is larger than the sum of its proper divisors (513252189).

1022020011 is an equidigital number, since it uses as much as digits as its factorization.

1022020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70680 (or 70671 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1022020011 is about 31969.0477024262. The cubic root of 1022020011 is about 1007.2867775703.

Adding to 1022020011 its reverse (1100202201), we get a palindrome (2122222212).

The spelling of 1022020011 in words is "one billion, twenty-two million, twenty thousand, eleven".

Divisors: 1 3 9 27 81 179 537 1611 4833 14499 70489 211467 634401 1903203 5709609 12617531 37852593 113557779 340673337 1022020011