20100010201820 has 36 divisors (see below), whose sum is σ = 44548526781864. Its totient is φ = 7616845968480.

The previous prime is 20100010201819. The next prime is 20100010201823. The reversal of 20100010201820 is 2810201000102.

It is a happy number.

It is a super-2 number, since 2×20100010201820² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100010201823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1391960246 + ... + 1391974685.

It is an arithmetic number, because the mean of its divisors is an integer number (1237459077274).

Almost surely, 2^{20100010201820} is an apocalyptic number.

20100010201820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20100010201820 is an abundant number, since it is smaller than the sum of its proper divisors (24448516580044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20100010201820 is a wasteful number, since it uses less digits than its factorization.

20100010201820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2783934978 (or 2783934957 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20100010201820 its reverse (2810201000102), we get a palindrome (22910211201922).

The spelling of 20100010201820 in words is "twenty trillion, one hundred billion, ten million, two hundred one thousand, eight hundred twenty".