21347173601 has 16 divisors (see below), whose sum is σ = 23520478464. Its totient is φ = 19251260544.

The previous prime is 21347173597. The next prime is 21347173621. The reversal of 21347173601 is 10637174312.

It is a cyclic number.

It is not a de Polignac number, because 21347173601 - 2² = 21347173597 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21347173621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 312965 + ... + 375021.

It is an arithmetic number, because the mean of its divisors is an integer number (1470029904).

Almost surely, 2^21347173601 is an apocalyptic number.

It is an amenable number.

21347173601 is a deficient number, since it is larger than the sum of its proper divisors (2173304863).

21347173601 is a wasteful number, since it uses less digits than its factorization.

21347173601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62680.

The product of its (nonzero) digits is 21168, while the sum is 35.

The spelling of 21347173601 in words is "twenty-one billion, three hundred forty-seven million, one hundred seventy-three thousand, six hundred one".