21632310725430 has 128 divisors (see below), whose sum is σ = 52431134192640. Its totient is φ = 5711822438400.

The previous prime is 21632310725423. The next prime is 21632310725453. The reversal of 21632310725430 is 3452701323612.

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 63 ways as a sum of consecutive naturals, for example, 2747653974 + ... + 2747661846.

It is an arithmetic number, because the mean of its divisors is an integer number (409618235880).

Almost surely, 2^{21632310725430} is an apocalyptic number.

21632310725430 is an abundant number, since it is smaller than the sum of its proper divisors (30798823467210).

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

21632310725430 is a wasteful number, since it uses less digits than its factorization.

21632310725430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9926.

The product of its (nonzero) digits is 181440, while the sum is 39.

The spelling of 21632310725430 in words is "twenty-one trillion, six hundred thirty-two billion, three hundred ten million, seven hundred twenty-five thousand, four hundred thirty".