21452142770 has 32 divisors (see below), whose sum is σ = 39034165248. Its totient is φ = 8487859968.

The previous prime is 21452142749. The next prime is 21452142787. The reversal of 21452142770 is 7724125412.

It is a self number, because there is not a number n which added to its sum of digits gives 21452142770.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402929 + ... + 453051.

It is an arithmetic number, because the mean of its divisors is an integer number (1219817664).

Almost surely, 2^21452142770 is an apocalyptic number.

21452142770 is a deficient number, since it is larger than the sum of its proper divisors (17582022478).

21452142770 is a wasteful number, since it uses less digits than its factorization.

21452142770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50594.

The product of its (nonzero) digits is 31360, while the sum is 35.

The spelling of 21452142770 in words is "twenty-one billion, four hundred fifty-two million, one hundred forty-two thousand, seven hundred seventy".