20292745 has 16 divisors (see below), whose sum is σ = 27216000. Its totient is φ = 14396800.

The previous prime is 20292737. The next prime is 20292763. The reversal of 20292745 is 54729202.

It is not a de Polignac number, because 20292745 - 2³ = 20292737 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2245 + ... + 6754.

It is an arithmetic number, because the mean of its divisors is an integer number (1701000).

Almost surely, 2^20292745 is an apocalyptic number.

It is an amenable number.

20292745 is a deficient number, since it is larger than the sum of its proper divisors (6923255).

20292745 is a wasteful number, since it uses less digits than its factorization.

20292745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9056.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 20292745 is about 4504.7469407282. The cubic root of 20292745 is about 272.7597388791.

It can be divided in two parts, 2029 and 2745, that added together give a palindrome (4774).

The spelling of 20292745 in words is "twenty million, two hundred ninety-two thousand, seven hundred forty-five".