21372371720700 has 576 divisors, whose sum is σ = 83103399042048. Its totient is φ = 4095595929600.

The previous prime is 21372371720669. The next prime is 21372371720737. The reversal of 21372371720700 is 702717327312.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 329396662 + ... + 329461538.

It is an arithmetic number, because the mean of its divisors is an integer number (144276734448).

Almost surely, 2^{21372371720700} is an apocalyptic number.

21372371720700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21372371720700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41551699521024).

21372371720700 is an abundant number, since it is smaller than the sum of its proper divisors (61731027321348).

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

21372371720700 is a wasteful number, since it uses less digits than its factorization.

21372371720700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66022 (or 66015 counting only the distinct ones).

The product of its (nonzero) digits is 172872, while the sum is 42.

The spelling of 21372371720700 in words is "twenty-one trillion, three hundred seventy-two billion, three hundred seventy-one million, seven hundred twenty thousand, seven hundred".