20840164352 has 44 divisors (see below), whose sum is σ = 47611418640. Its totient is φ = 8931495936.

The previous prime is 20840164309. The next prime is 20840164393. The reversal of 20840164352 is 25346104802.

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, 1446527 + ... + 1460862.

Almost surely, 2^20840164352 is an apocalyptic number.

It is an amenable number.

20840164352 is an abundant number, since it is smaller than the sum of its proper divisors (26771254288).

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

20840164352 is an equidigital number, since it uses as much as digits as its factorization.

20840164352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2907416 (or 2907398 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The spelling of 20840164352 in words is "twenty billion, eight hundred forty million, one hundred sixty-four thousand, three hundred fifty-two".