20456151 has 8 divisors (see below), whose sum is σ = 28879344. Its totient is φ = 12835200.

The previous prime is 20456143. The next prime is 20456197. The reversal of 20456151 is 15165402.

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

It is not a de Polignac number, because 20456151 - 2³ = 20456143 is a prime.

It is a super-2 number, since 2×20456151² = 836908227469602, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20456551) 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, 200500 + ... + 200601.

It is an arithmetic number, because the mean of its divisors is an integer number (3609918).

Almost surely, 2^20456151 is an apocalyptic number.

20456151 is the 2861-st centered pentagonal number.

20456151 is a deficient number, since it is larger than the sum of its proper divisors (8423193).

20456151 is a wasteful number, since it uses less digits than its factorization.

20456151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401121.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 20456151 is about 4522.8476649120. The cubic root of 20456151 is about 273.4899091335.

The spelling of 20456151 in words is "twenty million, four hundred fifty-six thousand, one hundred fifty-one".