20155074 has 32 divisors (see below), whose sum is σ = 41286336. Its totient is φ = 6557760.

The previous prime is 20155073. The next prime is 20155097. The reversal of 20155074 is 47055102.

It is not an unprimeable number, because it can be changed into a prime (20155073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72624 + ... + 72900.

It is an arithmetic number, because the mean of its divisors is an integer number (1290198).

Almost surely, 2^20155074 is an apocalyptic number.

20155074 is an abundant number, since it is smaller than the sum of its proper divisors (21131262).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20155074 is a wasteful number, since it uses less digits than its factorization.

20155074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 20155074 is about 4489.4402769165. The cubic root of 20155074 is about 272.1415155323.

The spelling of 20155074 in words is "twenty million, one hundred fifty-five thousand, seventy-four".