20451274 has 8 divisors (see below), whose sum is σ = 30704580. Its totient is φ = 10216416.

The previous prime is 20451271. The next prime is 20451311. The reversal of 20451274 is 47215402.

It can be written as a sum of positive squares in 2 ways, for example, as 20385225 + 66049 = 4515^2 + 257^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20451271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1389 + ... + 6544.

Almost surely, 2^20451274 is an apocalyptic number.

20451274 is a deficient number, since it is larger than the sum of its proper divisors (10253306).

20451274 is a wasteful number, since it uses less digits than its factorization.

20451274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9224.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 20451274 is about 4522.3084812958. The cubic root of 20451274 is about 273.4681729444.

Adding to 20451274 its reverse (47215402), we get a palindrome (67666676).

The spelling of 20451274 in words is "twenty million, four hundred fifty-one thousand, two hundred seventy-four".