21152500142 has 8 divisors (see below), whose sum is σ = 31733451000. Its totient is φ = 10574683144.

The previous prime is 21152500133. The next prime is 21152500147. The reversal of 21152500142 is 24100525112.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21152500147) 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, 766517 + ... + 793632.

It is an arithmetic number, because the mean of its divisors is an integer number (3966681375).

Almost surely, 2^21152500142 is an apocalyptic number.

21152500142 is a deficient number, since it is larger than the sum of its proper divisors (10580950858).

21152500142 is a wasteful number, since it uses less digits than its factorization.

21152500142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566930.

The product of its (nonzero) digits is 800, while the sum is 23.

The spelling of 21152500142 in words is "twenty-one billion, one hundred fifty-two million, five hundred thousand, one hundred forty-two".