20953814431 has 16 divisors (see below), whose sum is σ = 22948727040. Its totient is φ = 18974062080.

The previous prime is 20953814419. The next prime is 20953814443. The reversal of 20953814431 is 13441835902.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20953814419) and next prime (20953814443).

It is a cyclic number.

It is not a de Polignac number, because 20953814431 - 2¹³ = 20953806239 is a prime.

It is a super-2 number, since 2×20953814431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20953814461) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3087600 + ... + 3094378.

It is an arithmetic number, because the mean of its divisors is an integer number (1434295440).

Almost surely, 2^20953814431 is an apocalyptic number.

20953814431 is a deficient number, since it is larger than the sum of its proper divisors (1994912609).

20953814431 is a wasteful number, since it uses less digits than its factorization.

20953814431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7854.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 20953814431 in words is "twenty billion, nine hundred fifty-three million, eight hundred fourteen thousand, four hundred thirty-one".