21374267507735 has 16 divisors (see below), whose sum is σ = 25756657560000. Its totient is φ = 17027866791936.

The previous prime is 21374267507729. The next prime is 21374267507767. The reversal of 21374267507735 is 53770576247312.

It is a cyclic number.

It is not a de Polignac number, because 21374267507735 - 2²⁶ = 21374200398871 is a prime.

It is a super-2 number, since 2×21374267507735² (a number of 27 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 15 ways as a sum of consecutive naturals, for example, 7799210 + ... + 10177239.

It is an arithmetic number, because the mean of its divisors is an integer number (1609791097500).

Almost surely, 2^{21374267507735} is an apocalyptic number.

21374267507735 is a deficient number, since it is larger than the sum of its proper divisors (4382390052265).

21374267507735 is a wasteful number, since it uses less digits than its factorization.

21374267507735 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17977450.

The product of its (nonzero) digits is 51861600, while the sum is 59.

The spelling of 21374267507735 in words is "twenty-one trillion, three hundred seventy-four billion, two hundred sixty-seven million, five hundred seven thousand, seven hundred thirty-five".