20414233621 has 2 divisors, whose sum is σ = 20414233622. Its totient is φ = 20414233620.

The previous prime is 20414233613. The next prime is 20414233663. The reversal of 20414233621 is 12633241402.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11537767396 + 8876466225 = 107414^2 + 94215^2 .

It is a cyclic number.

It is not a de Polignac number, because 20414233621 - 2³ = 20414233613 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20414233621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20414233321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10207116810 + 10207116811.

It is an arithmetic number, because the mean of its divisors is an integer number (10207116811).

Almost surely, 2^20414233621 is an apocalyptic number.

It is an amenable number.

20414233621 is a deficient number, since it is larger than the sum of its proper divisors (1).

20414233621 is an equidigital number, since it uses as much as digits as its factorization.

20414233621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 28.

The spelling of 20414233621 in words is "twenty billion, four hundred fourteen million, two hundred thirty-three thousand, six hundred twenty-one".