20637493411 has 2 divisors, whose sum is σ = 20637493412. Its totient is φ = 20637493410.

The previous prime is 20637493399. The next prime is 20637493421. The reversal of 20637493411 is 11439473602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20637493411 - 2⁵ = 20637493379 is a prime.

It is a super-2 number, since 2×20637493411² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20637493421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10318746705 + 10318746706.

It is an arithmetic number, because the mean of its divisors is an integer number (10318746706).

Almost surely, 2^20637493411 is an apocalyptic number.

20637493411 is a deficient number, since it is larger than the sum of its proper divisors (1).

20637493411 is an equidigital number, since it uses as much as digits as its factorization.

20637493411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 40.

The spelling of 20637493411 in words is "twenty billion, six hundred thirty-seven million, four hundred ninety-three thousand, four hundred eleven".