20475464436 has 36 divisors (see below), whose sum is σ = 59151342432. Its totient is φ = 5850132624.

The previous prime is 20475464407. The next prime is 20475464459. The reversal of 20475464436 is 63446457402.

20475464436 is a `hidden beast` number, since 20 + 47 + 546 + 4 + 43 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 20475464391 and 20475464400.

It is a congruent number.

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, 40625670 + ... + 40626173.

Almost surely, 2^20475464436 is an apocalyptic number.

It is an amenable number.

20475464436 is an abundant number, since it is smaller than the sum of its proper divisors (38675877996).

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

20475464436 is a wasteful number, since it uses less digits than its factorization.

20475464436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81251860 (or 81251855 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 45.

The spelling of 20475464436 in words is "twenty billion, four hundred seventy-five million, four hundred sixty-four thousand, four hundred thirty-six".