21252522958 has 16 divisors (see below), whose sum is σ = 31995025920. Its totient is φ = 10587555000.

The previous prime is 21252522931. The next prime is 21252522959. The reversal of 21252522958 is 85922525212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21252522959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1155333 + ... + 1173583.

It is an arithmetic number, because the mean of its divisors is an integer number (1999689120).

Almost surely, 2^21252522958 is an apocalyptic number.

21252522958 is a deficient number, since it is larger than the sum of its proper divisors (10742502962).

21252522958 is a wasteful number, since it uses less digits than its factorization.

21252522958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20343.

The product of its digits is 288000, while the sum is 43.

The spelling of 21252522958 in words is "twenty-one billion, two hundred fifty-two million, five hundred twenty-two thousand, nine hundred fifty-eight".