20254961 has 4 divisors (see below), whose sum is σ = 20269632. Its totient is φ = 20240292.

The previous prime is 20254937. The next prime is 20254967. The reversal of 20254961 is 16945202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20254961 is a prime.

It is a super-2 number, since 2×20254961² = 820526890223042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20254967) by changing a digit.

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, 5021 + ... + 8106.

It is an arithmetic number, because the mean of its divisors is an integer number (5067408).

Almost surely, 2^20254961 is an apocalyptic number.

It is an amenable number.

20254961 is a deficient number, since it is larger than the sum of its proper divisors (14671).

20254961 is a wasteful number, since it uses less digits than its factorization.

20254961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14670.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 20254961 is about 4500.5511884657. The cubic root of 20254961 is about 272.5903457130.

The spelling of 20254961 in words is "twenty million, two hundred fifty-four thousand, nine hundred sixty-one".