20949296394 has 16 divisors (see below), whose sum is σ = 45121561632. Its totient is φ = 6445937328.

The previous prime is 20949296371. The next prime is 20949296453. The reversal of 20949296394 is 49369294902.

It is a happy number.

It is a super-2 number, since 2×20949296394² (a number of 21 digits) contains 22 as substring.

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, 134290284 + ... + 134290439.

It is an arithmetic number, because the mean of its divisors is an integer number (2820097602).

Almost surely, 2^20949296394 is an apocalyptic number.

20949296394 is an abundant number, since it is smaller than the sum of its proper divisors (24172265238).

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

20949296394 is a wasteful number, since it uses less digits than its factorization.

20949296394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268580741.

The product of its (nonzero) digits is 7558272, while the sum is 57.

The spelling of 20949296394 in words is "twenty billion, nine hundred forty-nine million, two hundred ninety-six thousand, three hundred ninety-four".