20767091 has 8 divisors (see below), whose sum is σ = 22132224. Its totient is φ = 19440520.

The previous prime is 20767063. The next prime is 20767099. The reversal of 20767091 is 19076702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-20767091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20767099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8525 + ... + 10686.

It is an arithmetic number, because the mean of its divisors is an integer number (2766528).

Almost surely, 2^20767091 is an apocalyptic number.

20767091 is a deficient number, since it is larger than the sum of its proper divisors (1365133).

20767091 is a wasteful number, since it uses less digits than its factorization.

20767091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19281.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 20767091 is about 4557.0923844048. The cubic root of 20767091 is about 274.8686579412.

The spelling of 20767091 in words is "twenty million, seven hundred sixty-seven thousand, ninety-one".