20245661959 has 6 divisors (see below), whose sum is σ = 20294768120. Its totient is φ = 20196569820.

The previous prime is 20245661957. The next prime is 20245661963. The reversal of 20245661959 is 95916654202.

It is not a de Polignac number, because 20245661959 - 2¹ = 20245661957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20245661957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2977854 + ... + 2984644.

Almost surely, 2^20245661959 is an apocalyptic number.

20245661959 is a deficient number, since it is larger than the sum of its proper divisors (49106161).

20245661959 is an frugal number, since it uses more digits than its factorization.

20245661959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14021 (or 7230 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 20245661959 in words is "twenty billion, two hundred forty-five million, six hundred sixty-one thousand, nine hundred fifty-nine".