21525354422 has 64 divisors (see below), whose sum is σ = 38277550080. Its totient is φ = 8949916800.

The previous prime is 21525354413. The next prime is 21525354479. The reversal of 21525354422 is 22445352512.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21720347 + ... + 21721337.

It is an arithmetic number, because the mean of its divisors is an integer number (598086720).

Almost surely, 2^21525354422 is an apocalyptic number.

21525354422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21525354422 is a deficient number, since it is larger than the sum of its proper divisors (16752195658).

21525354422 is a wasteful number, since it uses less digits than its factorization.

21525354422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629.

The product of its digits is 96000, while the sum is 35.

The spelling of 21525354422 in words is "twenty-one billion, five hundred twenty-five million, three hundred fifty-four thousand, four hundred twenty-two".