21750703700 has 72 divisors (see below), whose sum is σ = 51806163360. Its totient is φ = 7860758400.

The previous prime is 21750703691. The next prime is 21750703763. The reversal of 21750703700 is 730705712.

It is a super-2 number, since 2×21750703700² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118646 + ... + 239954.

Almost surely, 2^21750703700 is an apocalyptic number.

21750703700 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 21750703700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25903081680).

21750703700 is an abundant number, since it is smaller than the sum of its proper divisors (30055459660).

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

21750703700 is a wasteful number, since it uses less digits than its factorization.

21750703700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121497 (or 121490 counting only the distinct ones).

The product of its (nonzero) digits is 10290, while the sum is 32.

The spelling of 21750703700 in words is "twenty-one billion, seven hundred fifty million, seven hundred three thousand, seven hundred".