20501604424 has 16 divisors (see below), whose sum is σ = 43932009600. Its totient is φ = 8786401872.

The previous prime is 20501604419. The next prime is 20501604443. The reversal of 20501604424 is 42440610502.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 20501604392 and 20501604401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183049984 + ... + 183050095.

It is an arithmetic number, because the mean of its divisors is an integer number (2745750600).

Almost surely, 2^20501604424 is an apocalyptic number.

It is an amenable number.

20501604424 is an abundant number, since it is smaller than the sum of its proper divisors (23430405176).

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

20501604424 is a wasteful number, since it uses less digits than its factorization.

20501604424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366100092 (or 366100088 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The spelling of 20501604424 in words is "twenty billion, five hundred one million, six hundred four thousand, four hundred twenty-four".