20738081 has 16 divisors (see below), whose sum is σ = 25646208. Its totient is φ = 16329600.

The previous prime is 20738057. The next prime is 20738119. The reversal of 20738081 is 18083702.

It is a de Polignac number, because none of the positive numbers 2^k-20738081 is a prime.

It is a super-2 number, since 2×20738081² = 860136007125122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20738021) 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, 25166 + ... + 25976.

It is an arithmetic number, because the mean of its divisors is an integer number (1602888).

Almost surely, 2^20738081 is an apocalyptic number.

It is an amenable number.

20738081 is a deficient number, since it is larger than the sum of its proper divisors (4908127).

20738081 is a wasteful number, since it uses less digits than its factorization.

20738081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 20738081 is about 4553.9083214312. The cubic root of 20738081 is about 274.7406083002.

The spelling of 20738081 in words is "twenty million, seven hundred thirty-eight thousand, eighty-one".