21769714928 has 40 divisors (see below), whose sum is σ = 46389822528. Its totient is φ = 9833778432.

The previous prime is 21769714927. The next prime is 21769714957. The reversal of 21769714928 is 82941796712.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21769714927) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1103651 + ... + 1123202.

Almost surely, 2^21769714928 is an apocalyptic number.

It is an amenable number.

21769714928 is an abundant number, since it is smaller than the sum of its proper divisors (24620107600).

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

21769714928 is a wasteful number, since it uses less digits than its factorization.

21769714928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226921 (or 2226915 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 56.

The spelling of 21769714928 in words is "twenty-one billion, seven hundred sixty-nine million, seven hundred fourteen thousand, nine hundred twenty-eight".