20286511443025 has 81 divisors (see below), whose sum is σ = 26139492749523. Its totient is φ = 15617900793600.

The previous prime is 20286511443017. The next prime is 20286511443049. The reversal of 20286511443025 is 52034411568202.

The square root of 20286511443025 is 4504055.

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

It can be written as a sum of positive squares in 13 ways, for example, as 14571313583121 + 5715197859904 = 3817239^2 + 2390648^2 .

It is not a de Polignac number, because 20286511443025 - 2³ = 20286511443017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 117263071839 + ... + 117263072011.

Almost surely, 2^{20286511443025} is an apocalyptic number.

20286511443025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20286511443025 is the 4504055-th square number.

20286511443025 is the 2252028-th centered octagonal number.

It is an amenable number.

20286511443025 is a deficient number, since it is larger than the sum of its proper divisors (5852981306498).

20286511443025 is an frugal number, since it uses more digits than its factorization.

20286511443025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692 (or 346 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 43.

The spelling of 20286511443025 in words is "twenty trillion, two hundred eighty-six billion, five hundred eleven million, four hundred forty-three thousand, twenty-five".