21458670522 has 16 divisors (see below), whose sum is σ = 42919024512. Its totient is φ = 7152609600.

The previous prime is 21458670491. The next prime is 21458670523. The reversal of 21458670522 is 22507685412.

It is not an unprimeable number, because it can be changed into a prime (21458670523) 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, 147522 + ... + 254322.

It is an arithmetic number, because the mean of its divisors is an integer number (2682439032).

Almost surely, 2^21458670522 is an apocalyptic number.

21458670522 is an abundant number, since it is smaller than the sum of its proper divisors (21460353990).

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

21458670522 is a wasteful number, since it uses less digits than its factorization.

21458670522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140293.

The product of its (nonzero) digits is 268800, while the sum is 42.

The spelling of 21458670522 in words is "twenty-one billion, four hundred fifty-eight million, six hundred seventy thousand, five hundred twenty-two".