20397952910 has 16 divisors (see below), whose sum is σ = 36780627312. Its totient is φ = 8144889600.

The previous prime is 20397952907. The next prime is 20397952951. The reversal of 20397952910 is 1925979302.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1780451 + ... + 1791870.

It is an arithmetic number, because the mean of its divisors is an integer number (2298789207).

Almost surely, 2^20397952910 is an apocalyptic number.

20397952910 is a deficient number, since it is larger than the sum of its proper divisors (16382674402).

20397952910 is a wasteful number, since it uses less digits than its factorization.

20397952910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3572899.

The product of its (nonzero) digits is 306180, while the sum is 47.

The spelling of 20397952910 in words is "twenty billion, three hundred ninety-seven million, nine hundred fifty-two thousand, nine hundred ten".