20439663396 has 12 divisors (see below), whose sum is σ = 47692547952. Its totient is φ = 6813221128.

The previous prime is 20439663367. The next prime is 20439663467. The reversal of 20439663396 is 69336693402.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 851652630 + ... + 851652653.

It is an arithmetic number, because the mean of its divisors is an integer number (3974378996).

Almost surely, 2^20439663396 is an apocalyptic number.

It is an amenable number.

20439663396 is an abundant number, since it is smaller than the sum of its proper divisors (27252884556).

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

20439663396 is a wasteful number, since it uses less digits than its factorization.

20439663396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703305290 (or 1703305288 counting only the distinct ones).

The product of its (nonzero) digits is 3779136, while the sum is 51.

The spelling of 20439663396 in words is "twenty billion, four hundred thirty-nine million, six hundred sixty-three thousand, three hundred ninety-six".