20974348311 has 128 divisors (see below), whose sum is σ = 36229939200. Its totient is φ = 10523520000.

The previous prime is 20974348309. The next prime is 20974348379. The reversal of 20974348311 is 11384347902.

It is not a de Polignac number, because 20974348311 - 2¹ = 20974348309 is a prime.

It is a super-2 number, since 2×20974348311² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20974348711) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 29920261 + ... + 29920961.

It is an arithmetic number, because the mean of its divisors is an integer number (283046400).

Almost surely, 2^20974348311 is an apocalyptic number.

20974348311 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20974348311 is a deficient number, since it is larger than the sum of its proper divisors (15255590889).

20974348311 is a wasteful number, since it uses less digits than its factorization.

20974348311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861.

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 20974348311 in words is "twenty billion, nine hundred seventy-four million, three hundred forty-eight thousand, three hundred eleven".