21124267881734 has 16 divisors (see below), whose sum is σ = 32360735825856. Its totient is φ = 10337358096000.

The previous prime is 21124267881683. The next prime is 21124267881749. The reversal of 21124267881734 is 43718876242112.

It is a self number, because there is not a number n which added to its sum of digits gives 21124267881734.

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, 26153534 + ... + 26949134.

It is an arithmetic number, because the mean of its divisors is an integer number (2022545989116).

Almost surely, 2^{21124267881734} is an apocalyptic number.

21124267881734 is a deficient number, since it is larger than the sum of its proper divisors (11236467944122).

21124267881734 is a wasteful number, since it uses less digits than its factorization.

21124267881734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078111.

The product of its digits is 7225344, while the sum is 56.

The spelling of 21124267881734 in words is "twenty-one trillion, one hundred twenty-four billion, two hundred sixty-seven million, eight hundred eighty-one thousand, seven hundred thirty-four".