20408632392 has 16 divisors (see below), whose sum is σ = 51021581040. Its totient is φ = 6802877456.

The previous prime is 20408632381. The next prime is 20408632403. The reversal of 20408632392 is 29323680402.

It is an interprime number because it is at equal distance from previous prime (20408632381) and next prime (20408632403).

It is a super-2 number, since 2×20408632392² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20408632392.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425179818 + ... + 425179865.

It is an arithmetic number, because the mean of its divisors is an integer number (3188848815).

Almost surely, 2^20408632392 is an apocalyptic number.

It is an amenable number.

20408632392 is an abundant number, since it is smaller than the sum of its proper divisors (30612948648).

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

20408632392 is a wasteful number, since it uses less digits than its factorization.

20408632392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850359692 (or 850359688 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 39.

The spelling of 20408632392 in words is "twenty billion, four hundred eight million, six hundred thirty-two thousand, three hundred ninety-two".