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20424704 = 2119973
BaseRepresentation
bin100110111101…
…0100000000000
31102102200102112
41031322200000
520212042304
62005434452
7335415146
oct115724000
942380375
1020424704
1110590423
126a0ba28
134301831
1429d9596
151bd6b6e
hex137a800

20424704 has 24 divisors (see below), whose sum is σ = 40843530. Its totient is φ = 10211328.

The previous prime is 20424661. The next prime is 20424707. The reversal of 20424704 is 40742402.

It can be written as a sum of positive squares in only one way, i.e., 19784704 + 640000 = 4448^2 + 800^2 .

It is a super-3 number, since 3×204247043 (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20424704.

It is not an unprimeable number, because it can be changed into a prime (20424707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2939 + ... + 7034.

Almost surely, 220424704 is an apocalyptic number.

It is an amenable number.

20424704 is a deficient number, since it is larger than the sum of its proper divisors (20418826).

20424704 is an frugal number, since it uses more digits than its factorization.

20424704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9995 (or 9975 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 20424704 is about 4519.3698675811. The cubic root of 20424704 is about 273.3496929860.

The spelling of 20424704 in words is "twenty million, four hundred twenty-four thousand, seven hundred four".

Divisors: 1 2 4 8 16 32 64 128 256 512 1024 2048 9973 19946 39892 79784 159568 319136 638272 1276544 2553088 5106176 10212352 20424704