20152451 has 8 divisors (see below), whose sum is σ = 22037184. Its totient is φ = 18276520.

The previous prime is 20152441. The next prime is 20152459. The reversal of 20152451 is 15425102.

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

It is a cyclic number.

It is not a de Polignac number, because 20152451 - 2¹⁸ = 19890307 is a prime.

It is a super-2 number, since 2×20152451² = 812242562614802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20152459) 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, 3176 + ... + 7098.

It is an arithmetic number, because the mean of its divisors is an integer number (2754648).

Almost surely, 2^20152451 is an apocalyptic number.

20152451 is a deficient number, since it is larger than the sum of its proper divisors (1884733).

20152451 is a wasteful number, since it uses less digits than its factorization.

20152451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4401.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 20152451 is about 4489.1481374533. The cubic root of 20152451 is about 272.1297094372.

Adding to 20152451 its reverse (15425102), we get a palindrome (35577553).

The spelling of 20152451 in words is "twenty million, one hundred fifty-two thousand, four hundred fifty-one".