20245961 has 6 divisors (see below), whose sum is σ = 20587086. Its totient is φ = 19910400.

The previous prime is 20245943. The next prime is 20245999. The reversal of 20245961 is 16954202.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 175561 + 20070400 = 419^2 + 4480^2 .

It is a de Polignac number, because none of the positive numbers 2^k-20245961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20245931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1001 + ... + 6441.

It is an arithmetic number, because the mean of its divisors is an integer number (3431181).

Almost surely, 2^20245961 is an apocalyptic number.

It is an amenable number.

20245961 is a deficient number, since it is larger than the sum of its proper divisors (341125).

20245961 is an frugal number, since it uses more digits than its factorization.

20245961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5563 (or 5502 counting only the distinct ones).

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

The square root of 20245961 is about 4499.5511998420. The cubic root of 20245961 is about 272.5499658678.

The spelling of 20245961 in words is "twenty million, two hundred forty-five thousand, nine hundred sixty-one".