20152142 has 4 divisors (see below), whose sum is σ = 30228216. Its totient is φ = 10076070.

The previous prime is 20152127. The next prime is 20152159. The reversal of 20152142 is 24125102.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×20152142² = 812217654376328, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20152142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5038034 + ... + 5038037.

It is an arithmetic number, because the mean of its divisors is an integer number (7557054).

Almost surely, 2^20152142 is an apocalyptic number.

20152142 is a deficient number, since it is larger than the sum of its proper divisors (10076074).

20152142 is a wasteful number, since it uses less digits than its factorization.

20152142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10076073.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 20152142 is about 4489.1137209922. The cubic root of 20152142 is about 272.1283185640.

Adding to 20152142 its reverse (24125102), we get a palindrome (44277244).

The spelling of 20152142 in words is "twenty million, one hundred fifty-two thousand, one hundred forty-two".