20469562893 has 30 divisors (see below), whose sum is σ = 32937612554. Its totient is φ = 12593797056.

The previous prime is 20469562877. The next prime is 20469562909. The reversal of 20469562893 is 39826596402.

It is a happy number.

20469562893 is a `hidden beast` number, since 2 + 0 + 4 + 6 + 9 + 5 + 628 + 9 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (20469562877) and next prime (20469562909).

It can be written as a sum of positive squares in 3 ways, for example, as 1907680329 + 18561882564 = 43677^2 + 136242^2 .

It is not a de Polignac number, because 20469562893 - 2⁴ = 20469562877 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 (20469562843) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 4640473 + ... + 4644881.

Almost surely, 2^20469562893 is an apocalyptic number.

It is an amenable number.

20469562893 is a deficient number, since it is larger than the sum of its proper divisors (12468049661).

20469562893 is an frugal number, since it uses more digits than its factorization.

20469562893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8843 (or 4425 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The spelling of 20469562893 in words is "twenty billion, four hundred sixty-nine million, five hundred sixty-two thousand, eight hundred ninety-three".