20255456674 has 4 divisors (see below), whose sum is σ = 30383185014. Its totient is φ = 10127728336.

The previous prime is 20255456671. The next prime is 20255456693. The reversal of 20255456674 is 47665455202.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11725641225 + 8529815449 = 108285^2 + 92357^2 .

It is a super-2 number, since 2×20255456674² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20255456671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5063864167 + ... + 5063864170.

Almost surely, 2^20255456674 is an apocalyptic number.

20255456674 is a deficient number, since it is larger than the sum of its proper divisors (10127728340).

20255456674 is a wasteful number, since it uses less digits than its factorization.

20255456674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10127728339.

The product of its (nonzero) digits is 2016000, while the sum is 46.

The spelling of 20255456674 in words is "twenty billion, two hundred fifty-five million, four hundred fifty-six thousand, six hundred seventy-four".