21650544160426 has 8 divisors (see below), whose sum is σ = 32488263859140. Its totient is φ = 10821122874048.

The previous prime is 21650544160423. The next prime is 21650544160489. The reversal of 21650544160426 is 62406144505612.

It can be written as a sum of positive squares in 2 ways, for example, as 21557031132025 + 93513028401 = 4642955^2 + 305799^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21650544160423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2074596561 + ... + 2074606996.

Almost surely, 2^{21650544160426} is an apocalyptic number.

21650544160426 is a deficient number, since it is larger than the sum of its proper divisors (10837719698714).

21650544160426 is a wasteful number, since it uses less digits than its factorization.

21650544160426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4149206168.

The product of its (nonzero) digits is 1382400, while the sum is 46.

The spelling of 21650544160426 in words is "twenty-one trillion, six hundred fifty billion, five hundred forty-four million, one hundred sixty thousand, four hundred twenty-six".