20838366025 has 9 divisors (see below), whose sum is σ = 25840468903. Its totient is φ = 16670115400.

The previous prime is 20838366013. The next prime is 20838366127. The reversal of 20838366025 is 52066383802.

The square root of 20838366025 is 144355.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 7501811769 + 13336554256 = 86613^2 + 115484^2 .

It is not a de Polignac number, because 20838366025 - 2¹³ = 20838357833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 707340 + ... + 736210.

Almost surely, 2^20838366025 is an apocalyptic number.

20838366025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20838366025 is the 144355-th square number.

20838366025 is the 72178-th centered octagonal number.

It is an amenable number.

20838366025 is a deficient number, since it is larger than the sum of its proper divisors (5002102878).

20838366025 is an frugal number, since it uses more digits than its factorization.

20838366025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57752 (or 28876 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 20838366025 in words is "twenty billion, eight hundred thirty-eight million, three hundred sixty-six thousand, twenty-five".