20677002025 has 9 divisors (see below), whose sum is σ = 25640374071. Its totient is φ = 16541026440.

The previous prime is 20677002023. The next prime is 20677002061. The reversal of 20677002025 is 52020077602.

The square root of 20677002025 is 143795.

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., 7443720729 + 13233281296 = 86277^2 + 115036^2 .

It is not a de Polignac number, because 20677002025 - 2¹ = 20677002023 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20677002023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 704596 + ... + 733354.

Almost surely, 2^20677002025 is an apocalyptic number.

20677002025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20677002025 is the 143795-th square number.

20677002025 is the 71898-th centered octagonal number.

It is an amenable number.

20677002025 is a deficient number, since it is larger than the sum of its proper divisors (4963372046).

20677002025 is an frugal number, since it uses more digits than its factorization.

20677002025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57528 (or 28764 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

Adding to 20677002025 its reverse (52020077602), we get a palindrome (72697079627).

The spelling of 20677002025 in words is "twenty billion, six hundred seventy-seven million, two thousand, twenty-five".