21038450422080 has 672 divisors, whose sum is σ = 87014304000000. Its totient is φ = 4205252173824.

The previous prime is 21038450422069. The next prime is 21038450422091. The reversal of 21038450422080 is 8022405483012.

It is an interprime number because it is at equal distance from previous prime (21038450422069) and next prime (21038450422091).

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 21090421 + ... + 22065419.

Almost surely, 2^{21038450422080} is an apocalyptic number.

21038450422080 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 21038450422080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43507152000000).

21038450422080 is an abundant number, since it is smaller than the sum of its proper divisors (65975853577920).

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

21038450422080 is a wasteful number, since it uses less digits than its factorization.

21038450422080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975071 (or 975048 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 39.

The spelling of 21038450422080 in words is "twenty-one trillion, thirty-eight billion, four hundred fifty million, four hundred twenty-two thousand, eighty".