21082737628 has 6 divisors (see below), whose sum is σ = 36894790856. Its totient is φ = 10541368812.

The previous prime is 21082737581. The next prime is 21082737707. The reversal of 21082737628 is 82673728012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2635342200 + ... + 2635342207.

Almost surely, 2^21082737628 is an apocalyptic number.

It is an amenable number.

21082737628 is a deficient number, since it is larger than the sum of its proper divisors (15812053228).

21082737628 is a wasteful number, since it uses less digits than its factorization.

21082737628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5270684411 (or 5270684409 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 46.

The spelling of 21082737628 in words is "twenty-one billion, eighty-two million, seven hundred thirty-seven thousand, six hundred twenty-eight".