20274778 has 8 divisors (see below), whose sum is σ = 32201172. Its totient is φ = 9541056.

The previous prime is 20274773. The next prime is 20274791. The reversal of 20274778 is 87747202.

It can be written as a sum of positive squares in 2 ways, for example, as 19918369 + 356409 = 4463^2 + 597^2 .

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

It is a super-2 number, since 2×20274778² = 822133245898568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20274773) 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, 298125 + ... + 298192.

Almost surely, 2^20274778 is an apocalyptic number.

20274778 is a deficient number, since it is larger than the sum of its proper divisors (11926394).

20274778 is a wasteful number, since it uses less digits than its factorization.

20274778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596336.

The product of its (nonzero) digits is 43904, while the sum is 37.

The square root of 20274778 is about 4502.7522694459. The cubic root of 20274778 is about 272.6792154987.

The spelling of 20274778 in words is "twenty million, two hundred seventy-four thousand, seven hundred seventy-eight".