20131867451 has 2 divisors, whose sum is σ = 20131867452. Its totient is φ = 20131867450.

The previous prime is 20131867397. The next prime is 20131867471. The reversal of 20131867451 is 15476813102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20131867451 is a prime.

It is not a weakly prime, because it can be changed into another prime (20131867471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065933725 + 10065933726.

It is an arithmetic number, because the mean of its divisors is an integer number (10065933726).

Almost surely, 2^20131867451 is an apocalyptic number.

20131867451 is a deficient number, since it is larger than the sum of its proper divisors (1).

20131867451 is an equidigital number, since it uses as much as digits as its factorization.

20131867451 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 20131867451 in words is "twenty billion, one hundred thirty-one million, eight hundred sixty-seven thousand, four hundred fifty-one".