21770677602 has 36 divisors (see below), whose sum is σ = 47843721510. Its totient is φ = 7154652960.

The previous prime is 21770677597. The next prime is 21770677619. The reversal of 21770677602 is 20677607712.

It can be written as a sum of positive squares in only one way, i.e., 20184169041 + 1586508561 = 142071^2 + 39831^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 29227 + ... + 210702.

Almost surely, 2^21770677602 is an apocalyptic number.

21770677602 is an abundant number, since it is smaller than the sum of its proper divisors (26073043908).

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

21770677602 is a wasteful number, since it uses less digits than its factorization.

21770677602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240079 (or 240005 counting only the distinct ones).

The product of its (nonzero) digits is 345744, while the sum is 45.

The spelling of 21770677602 in words is "twenty-one billion, seven hundred seventy million, six hundred seventy-seven thousand, six hundred two".