20142451 has 16 divisors (see below), whose sum is σ = 24364800. Its totient is φ = 16266528.

The previous prime is 20142427. The next prime is 20142481. The reversal of 20142451 is 15424102.

It is a cyclic number.

It is not a de Polignac number, because 20142451 - 2⁷ = 20142323 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20142401) 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, 35496 + ... + 36058.

It is an arithmetic number, because the mean of its divisors is an integer number (1522800).

Almost surely, 2^20142451 is an apocalyptic number.

20142451 is a deficient number, since it is larger than the sum of its proper divisors (4222349).

20142451 is a wasteful number, since it uses less digits than its factorization.

20142451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 20142451 is about 4488.0342021870. The cubic root of 20142451 is about 272.0846901434.

Adding to 20142451 its reverse (15424102), we get a palindrome (35566553).

It can be divided in two parts, 2014 and 2451, that added together give a triangular number (4465 = T₉₄).

The spelling of 20142451 in words is "twenty million, one hundred forty-two thousand, four hundred fifty-one".