21022676540 has 24 divisors (see below), whose sum is σ = 46471180560. Its totient is φ = 7966487808.

The previous prime is 21022676537. The next prime is 21022676573. The reversal of 21022676540 is 4567622012.

It is a self number, because there is not a number n which added to its sum of digits gives 21022676540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27661037 + ... + 27661796.

It is an arithmetic number, because the mean of its divisors is an integer number (1936299190).

Almost surely, 2^21022676540 is an apocalyptic number.

21022676540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022676540 is an abundant number, since it is smaller than the sum of its proper divisors (25448504020).

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

21022676540 is a wasteful number, since it uses less digits than its factorization.

21022676540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55322861 (or 55322859 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The spelling of 21022676540 in words is "twenty-one billion, twenty-two million, six hundred seventy-six thousand, five hundred forty".