21277334604 has 48 divisors (see below), whose sum is σ = 53116878080. Its totient is φ = 6609003840.

The previous prime is 21277334587. The next prime is 21277334641. The reversal of 21277334604 is 40643377212.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 751024 + ... + 778839.

Almost surely, 2^21277334604 is an apocalyptic number.

It is an amenable number.

21277334604 is an abundant number, since it is smaller than the sum of its proper divisors (31839543476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21277334604 is a wasteful number, since it uses less digits than its factorization.

21277334604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1529950 (or 1529948 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 39.

The spelling of 21277334604 in words is "twenty-one billion, two hundred seventy-seven million, three hundred thirty-four thousand, six hundred four".