20885254709 has 8 divisors (see below), whose sum is σ = 22947828960. Its totient is φ = 18849999600.

The previous prime is 20885254697. The next prime is 20885254721. The reversal of 20885254709 is 90745258802.

It is an interprime number because it is at equal distance from previous prime (20885254697) and next prime (20885254721).

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

It is a cyclic number.

It is not a de Polignac number, because 20885254709 - 2¹² = 20885250613 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 (20885254739) 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, 6828182 + ... + 6831239.

It is an arithmetic number, because the mean of its divisors is an integer number (2868478620).

Almost surely, 2^20885254709 is an apocalyptic number.

It is an amenable number.

20885254709 is a deficient number, since it is larger than the sum of its proper divisors (2062574251).

20885254709 is a wasteful number, since it uses less digits than its factorization.

20885254709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13659571.

The product of its (nonzero) digits is 1612800, while the sum is 50.

The spelling of 20885254709 in words is "twenty billion, eight hundred eighty-five million, two hundred fifty-four thousand, seven hundred nine".