20120142 has 32 divisors (see below), whose sum is σ = 47577600. Its totient is φ = 5550048.

The previous prime is 20120081. The next prime is 20120143. The reversal of 20120142 is 24102102.

It is a super-2 number, since 2×20120142² = 809640228200328, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120143) 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, 7042 + ... + 9477.

It is an arithmetic number, because the mean of its divisors is an integer number (1486800).

Almost surely, 2^20120142 is an apocalyptic number.

20120142 is an abundant number, since it is smaller than the sum of its proper divisors (27457458).

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

20120142 is a wasteful number, since it uses less digits than its factorization.

20120142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16560.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 20120142 is about 4485.5481270409. The cubic root of 20120142 is about 271.9842028744.

Adding to 20120142 its reverse (24102102), we get a palindrome (44222244).

The spelling of 20120142 in words is "twenty million, one hundred twenty thousand, one hundred forty-two".