20949889202492 has 24 divisors (see below), whose sum is σ = 38819403465696. Its totient is φ = 9858646660608.

The previous prime is 20949889202467. The next prime is 20949889202521. The reversal of 20949889202492 is 29420298894902.

It is a Harshad number since it is a multiple of its sum of digits (68).

It is a congruent number.

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, 3579953 + ... + 7397015.

It is an arithmetic number, because the mean of its divisors is an integer number (1617475144404).

Almost surely, 2^{20949889202492} is an apocalyptic number.

It is an amenable number.

20949889202492 is a deficient number, since it is larger than the sum of its proper divisors (17869514263204).

20949889202492 is a wasteful number, since it uses less digits than its factorization.

20949889202492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3897797 (or 3897795 counting only the distinct ones).

The product of its (nonzero) digits is 107495424, while the sum is 68.

The spelling of 20949889202492 in words is "twenty trillion, nine hundred forty-nine billion, eight hundred eighty-nine million, two hundred two thousand, four hundred ninety-two".