21624212041450 has 12 divisors (see below), whose sum is σ = 40221034397190. Its totient is φ = 8649684816560.

The previous prime is 21624212041349. The next prime is 21624212041489. The reversal of 21624212041450 is 5414021242612.

It can be written as a sum of positive squares in 3 ways, for example, as 12426026853249 + 9198185188201 = 3525057^2 + 3032851^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 216242120365 + ... + 216242120464.

Almost surely, 2^{21624212041450} is an apocalyptic number.

21624212041450 is a deficient number, since it is larger than the sum of its proper divisors (18596822355740).

21624212041450 is a wasteful number, since it uses less digits than its factorization.

21624212041450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432484240841 (or 432484240836 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 34.

The spelling of 21624212041450 in words is "twenty-one trillion, six hundred twenty-four billion, two hundred twelve million, forty-one thousand, four hundred fifty".