21374360734 has 16 divisors (see below), whose sum is σ = 32403189456. Its totient is φ = 10573456000.

The previous prime is 21374360723. The next prime is 21374360743. The reversal of 21374360734 is 43706347312.

It is a super-2 number, since 2×21374360734² (a number of 21 digits) contains 22 as substring.

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, 236049 + ... + 313795.

It is an arithmetic number, because the mean of its divisors is an integer number (2025199341).

Almost surely, 2^21374360734 is an apocalyptic number.

21374360734 is a deficient number, since it is larger than the sum of its proper divisors (11028828722).

21374360734 is a wasteful number, since it uses less digits than its factorization.

21374360734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79211.

The product of its (nonzero) digits is 254016, while the sum is 40.

The spelling of 21374360734 in words is "twenty-one billion, three hundred seventy-four million, three hundred sixty thousand, seven hundred thirty-four".