20401042312 has 32 divisors (see below), whose sum is σ = 43721133120. Its totient is φ = 8742381120.

The previous prime is 20401042241. The next prime is 20401042367. The reversal of 20401042312 is 21324010402.

It is a self number, because there is not a number n which added to its sum of digits gives 20401042312.

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, 937378 + ... + 958894.

It is an arithmetic number, because the mean of its divisors is an integer number (1366285410).

Almost surely, 2^20401042312 is an apocalyptic number.

It is an amenable number.

20401042312 is an abundant number, since it is smaller than the sum of its proper divisors (23320090808).

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

20401042312 is a wasteful number, since it uses less digits than its factorization.

20401042312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38461 (or 38457 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20401042312 its reverse (21324010402), we get a palindrome (41725052714).

The spelling of 20401042312 in words is "twenty billion, four hundred one million, forty-two thousand, three hundred twelve".