20967913825 has 6 divisors (see below), whose sum is σ = 26000213174. Its totient is φ = 16774331040.

The previous prime is 20967913763. The next prime is 20967913843. The reversal of 20967913825 is 52831976902.

It can be written as a sum of positive squares in 3 ways, for example, as 152349649 + 20815564176 = 12343^2 + 144276^2 .

It is not a de Polignac number, because 20967913825 - 2¹⁵ = 20967881057 is a prime.

It is a super-2 number, since 2×20967913825² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 419358252 + ... + 419358301.

Almost surely, 2^20967913825 is an apocalyptic number.

20967913825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20967913825 is a deficient number, since it is larger than the sum of its proper divisors (5032299349).

20967913825 is an equidigital number, since it uses as much as digits as its factorization.

20967913825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838716563 (or 838716558 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 52.

The spelling of 20967913825 in words is "twenty billion, nine hundred sixty-seven million, nine hundred thirteen thousand, eight hundred twenty-five".