21149711719824 has 40 divisors (see below), whose sum is σ = 57512373977440. Its totient is φ = 6678856332288.

The previous prime is 21149711719823. The next prime is 21149711719837. The reversal of 21149711719824 is 42891711794112.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (21149711719823) 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, 11595235777 + ... + 11595237600.

It is an arithmetic number, because the mean of its divisors is an integer number (1437809349436).

Almost surely, 2^{21149711719824} is an apocalyptic number.

21149711719824 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

21149711719824 is an abundant number, since it is smaller than the sum of its proper divisors (36362662257616).

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

21149711719824 is a wasteful number, since it uses less digits than its factorization.

21149711719824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23190473407 (or 23190473401 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 57.

The spelling of 21149711719824 in words is "twenty-one trillion, one hundred forty-nine billion, seven hundred eleven million, seven hundred nineteen thousand, eight hundred twenty-four".