20155954 has 36 divisors (see below), whose sum is σ = 38114874. Its totient is φ = 7967232.

The previous prime is 20155951. The next prime is 20155987. The reversal of 20155954 is 45955102.

It can be written as a sum of positive squares in 3 ways, for example, as 8439025 + 11716929 = 2905^2 + 3423^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20155951) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15954 + ... + 17170.

Almost surely, 2^20155954 is an apocalyptic number.

20155954 is a deficient number, since it is larger than the sum of its proper divisors (17958920).

20155954 is a wasteful number, since it uses less digits than its factorization.

20155954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259 (or 1239 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 20155954 is about 4489.5382836100. The cubic root of 20155954 is about 272.1454761735.

The spelling of 20155954 in words is "twenty million, one hundred fifty-five thousand, nine hundred fifty-four".