20142955 has 8 divisors (see below), whose sum is σ = 27624672. Its totient is φ = 13812288.

The previous prime is 20142929. The next prime is 20142959. The reversal of 20142955 is 55924102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20142955 - 2¹¹ = 20140907 is a prime.

It is a super-2 number, since 2×20142955² = 811477272264050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20142959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 287722 + ... + 287791.

It is an arithmetic number, because the mean of its divisors is an integer number (3453084).

Almost surely, 2^20142955 is an apocalyptic number.

20142955 is a deficient number, since it is larger than the sum of its proper divisors (7481717).

20142955 is an equidigital number, since it uses as much as digits as its factorization.

20142955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 575525.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 20142955 is about 4488.0903511404. The cubic root of 20142955 is about 272.0869594723.

The spelling of 20142955 in words is "twenty million, one hundred forty-two thousand, nine hundred fifty-five".