20173451904 has 96 divisors (see below), whose sum is σ = 59146694100. Its totient is φ = 6597586944.

The previous prime is 20173451861. The next prime is 20173451923. The reversal of 20173451904 is 40915437102.

It can be written as a sum of positive squares in 2 ways, for example, as 19678478400 + 494973504 = 140280^2 + 22248^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104149 + ... + 226260.

Almost surely, 2^20173451904 is an apocalyptic number.

20173451904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20173451904 is an abundant number, since it is smaller than the sum of its proper divisors (38973242196).

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

20173451904 is a wasteful number, since it uses less digits than its factorization.

20173451904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330482 (or 330467 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The spelling of 20173451904 in words is "twenty billion, one hundred seventy-three million, four hundred fifty-one thousand, nine hundred four".