20154153431 has 2 divisors, whose sum is σ = 20154153432. Its totient is φ = 20154153430.

The previous prime is 20154153421. The next prime is 20154153451. The reversal of 20154153431 is 13435145102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20154153431 - 2¹⁸ = 20153891287 is a prime.

It is a super-2 number, since 2×20154153431² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20154153394 and 20154153403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20154153421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10077076715 + 10077076716.

It is an arithmetic number, because the mean of its divisors is an integer number (10077076716).

Almost surely, 2^20154153431 is an apocalyptic number.

20154153431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20154153431 is an equidigital number, since it uses as much as digits as its factorization.

20154153431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 20154153431 its reverse (13435145102), we get a palindrome (33589298533).

The spelling of 20154153431 in words is "twenty billion, one hundred fifty-four million, one hundred fifty-three thousand, four hundred thirty-one".