20925465 has 32 divisors (see below), whose sum is σ = 37711872. Its totient is φ = 9816000.

The previous prime is 20925439. The next prime is 20925467. The reversal of 20925465 is 56452902.

It is not a de Polignac number, because 20925465 - 2⁵ = 20925433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20925467) 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 31 ways as a sum of consecutive naturals, for example, 3070 + ... + 7160.

It is an arithmetic number, because the mean of its divisors is an integer number (1178496).

Almost surely, 2^20925465 is an apocalyptic number.

It is an amenable number.

20925465 is a deficient number, since it is larger than the sum of its proper divisors (16786407).

20925465 is a wasteful number, since it uses less digits than its factorization.

20925465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4141.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 20925465 is about 4574.4360308130. The cubic root of 20925465 is about 275.5656236987.

It can be divided in two parts, 2092 and 5465, that added together give a palindrome (7557).

The spelling of 20925465 in words is "twenty million, nine hundred twenty-five thousand, four hundred sixty-five".