21769943020 has 48 divisors (see below), whose sum is σ = 53522215488. Its totient is φ = 7281930240.

The previous prime is 21769942993. The next prime is 21769943029. The reversal of 21769943020 is 2034996712.

It is not an unprimeable number, because it can be changed into a prime (21769943029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1890597 + ... + 1902076.

It is an arithmetic number, because the mean of its divisors is an integer number (1115046156).

Almost surely, 2^21769943020 is an apocalyptic number.

21769943020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21769943020 is an abundant number, since it is smaller than the sum of its proper divisors (31752272468).

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

21769943020 is a wasteful number, since it uses less digits than its factorization.

21769943020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3792730 (or 3792728 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The spelling of 21769943020 in words is "twenty-one billion, seven hundred sixty-nine million, nine hundred forty-three thousand, twenty".