20942513087 has 2 divisors, whose sum is σ = 20942513088. Its totient is φ = 20942513086.

The previous prime is 20942513063. The next prime is 20942513099. The reversal of 20942513087 is 78031524902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20942513087 - 2¹⁴ = 20942496703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20942513687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10471256543 + 10471256544.

It is an arithmetic number, because the mean of its divisors is an integer number (10471256544).

Almost surely, 2^20942513087 is an apocalyptic number.

20942513087 is a deficient number, since it is larger than the sum of its proper divisors (1).

20942513087 is an equidigital number, since it uses as much as digits as its factorization.

20942513087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 20942513087 in words is "twenty billion, nine hundred forty-two million, five hundred thirteen thousand, eighty-seven".