21529053594 has 24 divisors (see below), whose sum is σ = 46684471392. Its totient is φ = 7170476040.

The previous prime is 21529053593. The next prime is 21529053599. The reversal of 21529053594 is 49535092512.

21529053594 is a `hidden beast` number, since 2 + 1 + 5 + 2 + 9 + 0 + 53 + 594 = 666.

It is not an unprimeable number, because it can be changed into a prime (21529053593) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 466972 + ... + 510999.

It is an arithmetic number, because the mean of its divisors is an integer number (1945186308).

Almost surely, 2^21529053594 is an apocalyptic number.

21529053594 is an abundant number, since it is smaller than the sum of its proper divisors (25155417798).

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

21529053594 is a wasteful number, since it uses less digits than its factorization.

21529053594 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979202 (or 979199 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The spelling of 21529053594 in words is "twenty-one billion, five hundred twenty-nine million, fifty-three thousand, five hundred ninety-four".