20039155 has 16 divisors (see below), whose sum is σ = 24727680. Its totient is φ = 15582592.

The previous prime is 20039099. The next prime is 20039191. The reversal of 20039155 is 55193002.

It is a cyclic number.

It is not a de Polignac number, because 20039155 - 2¹¹ = 20037107 is a prime.

It is a super-2 number, since 2×20039155² = 803135466228050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63057 + ... + 63373.

It is an arithmetic number, because the mean of its divisors is an integer number (1545480).

Almost surely, 2^20039155 is an apocalyptic number.

20039155 is a deficient number, since it is larger than the sum of its proper divisors (4688525).

20039155 is a wasteful number, since it uses less digits than its factorization.

20039155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 20039155 is about 4476.5114765853. The cubic root of 20039155 is about 271.6187845571.

The spelling of 20039155 in words is "twenty million, thirty-nine thousand, one hundred fifty-five".