20113151431 has 2 divisors, whose sum is σ = 20113151432. Its totient is φ = 20113151430.

The previous prime is 20113151393. The next prime is 20113151477. The reversal of 20113151431 is 13415131102.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20113151431 - 2⁹ = 20113150919 is a prime.

It is a super-2 number, since 2×20113151431² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20113158431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056575715 + 10056575716.

It is an arithmetic number, because the mean of its divisors is an integer number (10056575716).

Almost surely, 2^20113151431 is an apocalyptic number.

20113151431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20113151431 is an equidigital number, since it uses as much as digits as its factorization.

20113151431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

Adding to 20113151431 its reverse (13415131102), we get a palindrome (33528282533).

The spelling of 20113151431 in words is "twenty billion, one hundred thirteen million, one hundred fifty-one thousand, four hundred thirty-one".