20272505 has 16 divisors (see below), whose sum is σ = 26725248. Its totient is φ = 14640000.

The previous prime is 20272489. The next prime is 20272529. The reversal of 20272505 is 50527202.

It is not a de Polignac number, because 20272505 - 2⁴ = 20272489 is a prime.

It is a super-3 number, since 3×20272505³ (a number of 23 digits) contains 333 as substring.

It is a plaindrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7085 + ... + 9525.

It is an arithmetic number, because the mean of its divisors is an integer number (1670328).

Almost surely, 2^20272505 is an apocalyptic number.

It is an amenable number.

20272505 is a deficient number, since it is larger than the sum of its proper divisors (6452743).

20272505 is a wasteful number, since it uses less digits than its factorization.

20272505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2608.

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 20272505 is about 4502.4998611882. The cubic root of 20272505 is about 272.6690251196.

Adding to 20272505 its sum of digits (23), we get a triangular number (20272528 = T₆₃₆₇).

Adding to 20272505 its reverse (50527202), we get a palindrome (70799707).

The spelling of 20272505 in words is "twenty million, two hundred seventy-two thousand, five hundred five".