21226603077 has 6 divisors (see below), whose sum is σ = 30660648902. Its totient is φ = 14151068712.

The previous prime is 21226603063. The next prime is 21226603109. The reversal of 21226603077 is 77030662212.

It is a happy number.

21226603077 is a `hidden beast` number, since 21 + 2 + 26 + 603 + 0 + 7 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20773168641 + 453434436 = 144129^2 + 21294^2 .

It is not a de Polignac number, because 21226603077 - 2⁸ = 21226602821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21226603037) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1179255718 + ... + 1179255735.

Almost surely, 2^21226603077 is an apocalyptic number.

It is an amenable number.

21226603077 is a deficient number, since it is larger than the sum of its proper divisors (9434045825).

21226603077 is a wasteful number, since it uses less digits than its factorization.

21226603077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358511459 (or 2358511456 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The spelling of 21226603077 in words is "twenty-one billion, two hundred twenty-six million, six hundred three thousand, seventy-seven".