20155270 has 32 divisors (see below), whose sum is σ = 37969920. Its totient is φ = 7693920.

The previous prime is 20155249. The next prime is 20155271. The reversal of 20155270 is 7255102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20155271) 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, 24079 + ... + 24901.

It is an arithmetic number, because the mean of its divisors is an integer number (1186560).

Almost surely, 2^20155270 is an apocalyptic number.

20155270 is a deficient number, since it is larger than the sum of its proper divisors (17814650).

20155270 is a wasteful number, since it uses less digits than its factorization.

20155270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940.

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 20155270 is about 4489.4621058652. The cubic root of 20155270 is about 272.1423976851.

The spelling of 20155270 in words is "twenty million, one hundred fifty-five thousand, two hundred seventy".