21114429361936 has 15 divisors (see below), whose sum is σ = 40909242500373. Its totient is φ = 10557205490880.

The previous prime is 21114429361919. The next prime is 21114429361939. The reversal of 21114429361936 is 63916392441112.

The square root of 21114429361936 is 4595044.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1604893720336 + 19509535641600 = 1266844^2 + 4416960^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21114429361939) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 17805796 + ... + 18954556.

Almost surely, 2^{21114429361936} is an apocalyptic number.

21114429361936 is the 4595044-th square number.

It is an amenable number.

21114429361936 is a deficient number, since it is larger than the sum of its proper divisors (19794813138437).

21114429361936 is an frugal number, since it uses more digits than its factorization.

21114429361936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297530 (or 1148763 counting only the distinct ones).

The product of its digits is 1679616, while the sum is 52.

The spelling of 21114429361936 in words is "twenty-one trillion, one hundred fourteen billion, four hundred twenty-nine million, three hundred sixty-one thousand, nine hundred thirty-six".