20291884536 has 64 divisors (see below), whose sum is σ = 63247438080. Its totient is φ = 5270618880.

The previous prime is 20291884523. The next prime is 20291884589. The reversal of 20291884536 is 63548819202.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

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, 5488381 + ... + 5492076.

It is an arithmetic number, because the mean of its divisors is an integer number (988241220).

Almost surely, 2^20291884536 is an apocalyptic number.

It is an amenable number.

20291884536 is an abundant number, since it is smaller than the sum of its proper divisors (42955553544).

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

20291884536 is a wasteful number, since it uses less digits than its factorization.

20291884536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10980484 (or 10980480 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 20291884536 in words is "twenty billion, two hundred ninety-one million, eight hundred eighty-four thousand, five hundred thirty-six".