20704495 has 16 divisors (see below), whose sum is σ = 28680768. Its totient is φ = 14054400.

The previous prime is 20704469. The next prime is 20704499. The reversal of 20704495 is 59440702.

It is a de Polignac number, because none of the positive numbers 2^k-20704495 is a prime.

It is a super-2 number, since 2×20704495² = 857352226410050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20704499) 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, 607 + ... + 6463.

It is an arithmetic number, because the mean of its divisors is an integer number (1792548).

Almost surely, 2^20704495 is an apocalyptic number.

20704495 is a deficient number, since it is larger than the sum of its proper divisors (7976273).

20704495 is a wasteful number, since it uses less digits than its factorization.

20704495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5970.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 20704495 is about 4550.2192254879. The cubic root of 20704495 is about 274.5922110283.

The spelling of 20704495 in words is "twenty million, seven hundred four thousand, four hundred ninety-five".