20670865832 has 32 divisors (see below), whose sum is σ = 39667605120. Its totient is φ = 10093783680.

The previous prime is 20670865781. The next prime is 20670865951. The reversal of 20670865832 is 23856807602.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (47).

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, 116732 + ... + 234452.

It is an arithmetic number, because the mean of its divisors is an integer number (1239612660).

Almost surely, 2^20670865832 is an apocalyptic number.

It is an amenable number.

20670865832 is a deficient number, since it is larger than the sum of its proper divisors (18996739288).

20670865832 is a wasteful number, since it uses less digits than its factorization.

20670865832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118241 (or 118237 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The spelling of 20670865832 in words is "twenty billion, six hundred seventy million, eight hundred sixty-five thousand, eight hundred thirty-two".