20406515372 has 12 divisors (see below), whose sum is σ = 35712901896. Its totient is φ = 10202829120.

The previous prime is 20406515351. The next prime is 20406515417. The reversal of 20406515372 is 27351560402.

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, 15623 + ... + 202625.

It is an arithmetic number, because the mean of its divisors is an integer number (2976075158).

Almost surely, 2^20406515372 is an apocalyptic number.

It is an amenable number.

20406515372 is a deficient number, since it is larger than the sum of its proper divisors (15306386524).

20406515372 is a wasteful number, since it uses less digits than its factorization.

20406515372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214288 (or 214286 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 35.

The spelling of 20406515372 in words is "twenty billion, four hundred six million, five hundred fifteen thousand, three hundred seventy-two".