20712818670 has 32 divisors (see below), whose sum is σ = 51054301728. Its totient is φ = 5374136448.

The previous prime is 20712818653. The next prime is 20712818689. The reversal of 20712818670 is 7681821702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9328989 + ... + 9331208.

It is an arithmetic number, because the mean of its divisors is an integer number (1595446929).

Almost surely, 2^20712818670 is an apocalyptic number.

20712818670 is an abundant number, since it is smaller than the sum of its proper divisors (30341483058).

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

20712818670 is a wasteful number, since it uses less digits than its factorization.

20712818670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18660244.

The product of its (nonzero) digits is 75264, while the sum is 42.

The spelling of 20712818670 in words is "twenty billion, seven hundred twelve million, eight hundred eighteen thousand, six hundred seventy".