20734237270691 has 32 divisors (see below), whose sum is σ = 25408855296000. Its totient is φ = 16514340590592.

The previous prime is 20734237270687. The next prime is 20734237270699. The reversal of 20734237270691 is 19607273243702.

It is a cyclic number.

It is not a de Polignac number, because 20734237270691 - 2² = 20734237270687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20734237270699) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 394994375 + ... + 395046863.

It is an arithmetic number, because the mean of its divisors is an integer number (794026728000).

Almost surely, 2^{20734237270691} is an apocalyptic number.

20734237270691 is a deficient number, since it is larger than the sum of its proper divisors (4674618025309).

20734237270691 is a wasteful number, since it uses less digits than its factorization.

20734237270691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94611.

The product of its (nonzero) digits is 5334336, while the sum is 53.

The spelling of 20734237270691 in words is "twenty trillion, seven hundred thirty-four billion, two hundred thirty-seven million, two hundred seventy thousand, six hundred ninety-one".