22787452421 has 2 divisors, whose sum is σ = 22787452422. Its totient is φ = 22787452420.

The previous prime is 22787452403. The next prime is 22787452427. The reversal of 22787452421 is 12425478722.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22774129921 + 13322500 = 150911^2 + 3650^2 .

It is a cyclic number.

It is not a de Polignac number, because 22787452421 - 2²² = 22783258117 is a prime.

It is a super-2 number, since 2×22787452421² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22787452427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11393726210 + 11393726211.

It is an arithmetic number, because the mean of its divisors is an integer number (11393726211).

Almost surely, 2^22787452421 is an apocalyptic number.

It is an amenable number.

22787452421 is a deficient number, since it is larger than the sum of its proper divisors (1).

22787452421 is an equidigital number, since it uses as much as digits as its factorization.

22787452421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 501760, while the sum is 44.

The spelling of 22787452421 in words is "twenty-two billion, seven hundred eighty-seven million, four hundred fifty-two thousand, four hundred twenty-one".