20431214087 has 2 divisors, whose sum is σ = 20431214088. Its totient is φ = 20431214086.

The previous prime is 20431214047. The next prime is 20431214123. The reversal of 20431214087 is 78041213402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20431214087 - 2¹⁸ = 20430951943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20431214047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10215607043 + 10215607044.

It is an arithmetic number, because the mean of its divisors is an integer number (10215607044).

Almost surely, 2^20431214087 is an apocalyptic number.

20431214087 is a deficient number, since it is larger than the sum of its proper divisors (1).

20431214087 is an equidigital number, since it uses as much as digits as its factorization.

20431214087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 32.

Adding to 20431214087 its reverse (78041213402), we get a palindrome (98472427489).

The spelling of 20431214087 in words is "twenty billion, four hundred thirty-one million, two hundred fourteen thousand, eighty-seven".