20791011 has 8 divisors (see below), whose sum is σ = 28926720. Its totient is φ = 13257992.

The previous prime is 20791007. The next prime is 20791019. The reversal of 20791011 is 11019702.

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

It is a cyclic number.

It is not a de Polignac number, because 20791011 - 2² = 20791007 is a prime.

It is a super-2 number, since 2×20791011² = 864532276804242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20791019) 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, 150591 + ... + 150728.

It is an arithmetic number, because the mean of its divisors is an integer number (3615840).

Almost surely, 2^20791011 is an apocalyptic number.

20791011 is a deficient number, since it is larger than the sum of its proper divisors (8135709).

20791011 is a wasteful number, since it uses less digits than its factorization.

20791011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301345.

The product of its (nonzero) digits is 126, while the sum is 21.

The square root of 20791011 is about 4559.7161095840. The cubic root of 20791011 is about 274.9741507384.

The spelling of 20791011 in words is "twenty million, seven hundred ninety-one thousand, eleven".