20580921969 has 8 divisors (see below), whose sum is σ = 27486439680. Its totient is φ = 13698009456.

The previous prime is 20580921967. The next prime is 20580921971. The reversal of 20580921969 is 96912908502.

It is an interprime number because it is at equal distance from previous prime (20580921967) and next prime (20580921971).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20580921969 - 2¹ = 20580921967 is a prime.

It is a super-2 number, since 2×20580921969² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20580921967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5649174 + ... + 5652815.

It is an arithmetic number, because the mean of its divisors is an integer number (3435804960).

Almost surely, 2^20580921969 is an apocalyptic number.

It is an amenable number.

20580921969 is a deficient number, since it is larger than the sum of its proper divisors (6905517711).

20580921969 is a wasteful number, since it uses less digits than its factorization.

20580921969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11302599.

The product of its (nonzero) digits is 699840, while the sum is 51.

The spelling of 20580921969 in words is "twenty billion, five hundred eighty million, nine hundred twenty-one thousand, nine hundred sixty-nine".