21621401714374 has 32 divisors (see below), whose sum is σ = 40585144608000. Its totient is φ = 8392607031840.

The previous prime is 21621401714371. The next prime is 21621401714449. The reversal of 21621401714374 is 47341710412612.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21621401714374.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21621401714371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260922724 + ... + 261005575.

It is an arithmetic number, because the mean of its divisors is an integer number (1268285769000).

Almost surely, 2^{21621401714374} is an apocalyptic number.

21621401714374 is a deficient number, since it is larger than the sum of its proper divisors (18963742893626).

21621401714374 is a wasteful number, since it uses less digits than its factorization.

21621401714374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521928588.

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 21621401714374 in words is "twenty-one trillion, six hundred twenty-one billion, four hundred one million, seven hundred fourteen thousand, three hundred seventy-four".