21374373724434 has 24 divisors (see below), whose sum is σ = 46323257041152. Its totient is φ = 7122927553560.

The previous prime is 21374373724411. The next prime is 21374373724439. The reversal of 21374373724434 is 43442737347312.

21374373724434 is a `hidden beast` number, since 2 + 1 + 3 + 74 + 3 + 73 + 72 + 4 + 434 = 666.

It is a super-2 number, since 2×21374373724434² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21374373724439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 155236602 + ... + 155374229.

It is an arithmetic number, because the mean of its divisors is an integer number (1930135710048).

Almost surely, 2^{21374373724434} is an apocalyptic number.

21374373724434 is an abundant number, since it is smaller than the sum of its proper divisors (24948883316718).

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

21374373724434 is a wasteful number, since it uses less digits than its factorization.

21374373724434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310614662 (or 310614659 counting only the distinct ones).

The product of its digits is 28449792, while the sum is 54.

The spelling of 21374373724434 in words is "twenty-one trillion, three hundred seventy-four billion, three hundred seventy-three million, seven hundred twenty-four thousand, four hundred thirty-four".