20375653631 has 2 divisors, whose sum is σ = 20375653632. Its totient is φ = 20375653630.

The previous prime is 20375653591. The next prime is 20375653633. The reversal of 20375653631 is 13635657302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20375653631 - 2³⁰ = 19301911807 is a prime.

It is a super-2 number, since 2×20375653631² (a number of 21 digits) contains 22 as substring.

Together with 20375653633, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20375653633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10187826815 + 10187826816.

It is an arithmetic number, because the mean of its divisors is an integer number (10187826816).

Almost surely, 2^20375653631 is an apocalyptic number.

20375653631 is a deficient number, since it is larger than the sum of its proper divisors (1).

20375653631 is an equidigital number, since it uses as much as digits as its factorization.

20375653631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 340200, while the sum is 41.

The spelling of 20375653631 in words is "twenty billion, three hundred seventy-five million, six hundred fifty-three thousand, six hundred thirty-one".