20445551504 has 40 divisors (see below), whose sum is σ = 45892479360. Its totient is φ = 8642343168.

The previous prime is 20445551473. The next prime is 20445551507. The reversal of 20445551504 is 40515554402.

It is not an unprimeable number, because it can be changed into a prime (20445551507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1242164 + ... + 1258515.

It is an arithmetic number, because the mean of its divisors is an integer number (1147311984).

Almost surely, 2^20445551504 is an apocalyptic number.

It is an amenable number.

20445551504 is an abundant number, since it is smaller than the sum of its proper divisors (25446927856).

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

20445551504 is a wasteful number, since it uses less digits than its factorization.

20445551504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2500767 (or 2500761 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 35.

The spelling of 20445551504 in words is "twenty billion, four hundred forty-five million, five hundred fifty-one thousand, five hundred four".