20473656 has 32 divisors (see below), whose sum is σ = 58496640. Its totient is φ = 5849568.

The previous prime is 20473601. The next prime is 20473667. The reversal of 20473656 is 65637402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60766 + ... + 61101.

It is an arithmetic number, because the mean of its divisors is an integer number (1828020).

Almost surely, 2^20473656 is an apocalyptic number.

It is an amenable number.

20473656 is an abundant number, since it is smaller than the sum of its proper divisors (38022984).

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

20473656 is a wasteful number, since it uses less digits than its factorization.

20473656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121883 (or 121879 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 20473656 is about 4524.7824257084. The cubic root of 20473656 is about 273.5678983232.

The spelling of 20473656 in words is "twenty million, four hundred seventy-three thousand, six hundred fifty-six".