21373466543740 has 24 divisors (see below), whose sum is σ = 44884625168880. Its totient is φ = 8549320821888.

The previous prime is 21373466543651. The next prime is 21373466543791. The reversal of 21373466543740 is 4734566437312.

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, 1405017 + ... + 6687376.

It is an arithmetic number, because the mean of its divisors is an integer number (1870192715370).

Almost surely, 2^{21373466543740} is an apocalyptic number.

21373466543740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21373466543740 is an abundant number, since it is smaller than the sum of its proper divisors (23511158625140).

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

21373466543740 is a wasteful number, since it uses less digits than its factorization.

21373466543740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8224461 (or 8224459 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 55.

The spelling of 21373466543740 in words is "twenty-one trillion, three hundred seventy-three billion, four hundred sixty-six million, five hundred forty-three thousand, seven hundred forty".