20015275 has 18 divisors (see below), whose sum is σ = 28872780. Its totient is φ = 13723920.

The previous prime is 20015251. The next prime is 20015293. The reversal of 20015275 is 57251002.

It is not a de Polignac number, because 20015275 - 2⁷ = 20015147 is a prime.

It is a super-2 number, since 2×20015275² = 801222466651250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6945 + ... + 9394.

Almost surely, 2^20015275 is an apocalyptic number.

20015275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20015275 is a deficient number, since it is larger than the sum of its proper divisors (8857505).

20015275 is a wasteful number, since it uses less digits than its factorization.

20015275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16363 (or 16351 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 22.

The square root of 20015275 is about 4473.8434259594. The cubic root of 20015275 is about 271.5108486226.

Adding to 20015275 its reverse (57251002), we get a palindrome (77266277).

The spelling of 20015275 in words is "twenty million, fifteen thousand, two hundred seventy-five".