20869799870 has 16 divisors (see below), whose sum is σ = 37568352528. Its totient is φ = 8347317120.

The previous prime is 20869799857. The next prime is 20869799903. The reversal of 20869799870 is 7899796802.

It is a super-2 number, since 2×20869799870² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20869799797 and 20869799806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86630 + ... + 221910.

It is an arithmetic number, because the mean of its divisors is an integer number (2348022033).

Almost surely, 2^20869799870 is an apocalyptic number.

20869799870 is a deficient number, since it is larger than the sum of its proper divisors (16698552658).

20869799870 is a wasteful number, since it uses less digits than its factorization.

20869799870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150715.

The product of its (nonzero) digits is 27433728, while the sum is 65.

The spelling of 20869799870 in words is "twenty billion, eight hundred sixty-nine million, seven hundred ninety-nine thousand, eight hundred seventy".