20461016431 has 2 divisors, whose sum is σ = 20461016432. Its totient is φ = 20461016430.

The previous prime is 20461016399. The next prime is 20461016441. The reversal of 20461016431 is 13461016402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20461016431 - 2⁵ = 20461016399 is a prime.

It is a super-2 number, since 2×20461016431² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20461016431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20461016441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10230508215 + 10230508216.

It is an arithmetic number, because the mean of its divisors is an integer number (10230508216).

Almost surely, 2^20461016431 is an apocalyptic number.

20461016431 is a deficient number, since it is larger than the sum of its proper divisors (1).

20461016431 is an equidigital number, since it uses as much as digits as its factorization.

20461016431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The spelling of 20461016431 in words is "twenty billion, four hundred sixty-one million, sixteen thousand, four hundred thirty-one".