21004142132 has 24 divisors (see below), whose sum is σ = 38278770432. Its totient is φ = 10073347200.

The previous prime is 21004142111. The next prime is 21004142183. The reversal of 21004142132 is 23124140012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 735494 + ... + 763517.

It is an arithmetic number, because the mean of its divisors is an integer number (1594948768).

Almost surely, 2^21004142132 is an apocalyptic number.

It is an amenable number.

21004142132 is a deficient number, since it is larger than the sum of its proper divisors (17274628300).

21004142132 is a wasteful number, since it uses less digits than its factorization.

21004142132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499159 (or 1499157 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21004142132 its reverse (23124140012), we get a palindrome (44128282144).

The spelling of 21004142132 in words is "twenty-one billion, four million, one hundred forty-two thousand, one hundred thirty-two".