21720100526374 has 4 divisors (see below), whose sum is σ = 32580150789564. Its totient is φ = 10860050263186.

The previous prime is 21720100526359. The next prime is 21720100526407. The reversal of 21720100526374 is 47362500102712.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21720100526374² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5430025131592 + ... + 5430025131595.

It is an arithmetic number, because the mean of its divisors is an integer number (8145037697391).

Almost surely, 2^{21720100526374} is an apocalyptic number.

21720100526374 is a deficient number, since it is larger than the sum of its proper divisors (10860050263190).

21720100526374 is a wasteful number, since it uses less digits than its factorization.

21720100526374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10860050263189.

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 21720100526374 in words is "twenty-one trillion, seven hundred twenty billion, one hundred million, five hundred twenty-six thousand, three hundred seventy-four".