21957441080 has 32 divisors (see below), whose sum is σ = 49553529840. Its totient is φ = 8756436480.

The previous prime is 21957441013. The next prime is 21957441083. The reversal of 21957441080 is 8014475912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21957441083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 815969 + ... + 842448.

Almost surely, 2^21957441080 is an apocalyptic number.

21957441080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21957441080 is an abundant number, since it is smaller than the sum of its proper divisors (27596088760).

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

21957441080 is a wasteful number, since it uses less digits than its factorization.

21957441080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658759 (or 1658755 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The spelling of 21957441080 in words is "twenty-one billion, nine hundred fifty-seven million, four hundred forty-one thousand, eighty".