20451154 has 8 divisors (see below), whose sum is σ = 30860928. Its totient is φ = 10164180.

The previous prime is 20451131. The next prime is 20451181. The reversal of 20451154 is 45115402.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30282 + ... + 30949.

It is an arithmetic number, because the mean of its divisors is an integer number (3857616).

Almost surely, 2^20451154 is an apocalyptic number.

20451154 is a deficient number, since it is larger than the sum of its proper divisors (10409774).

20451154 is a wasteful number, since it uses less digits than its factorization.

20451154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61400.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 20451154 is about 4522.2952137162. The cubic root of 20451154 is about 273.4676380756.

Adding to 20451154 its reverse (45115402), we get a palindrome (65566556).

The spelling of 20451154 in words is "twenty million, four hundred fifty-one thousand, one hundred fifty-four".