20264385 has 8 divisors (see below), whose sum is σ = 32423040. Its totient is φ = 10807664.

The previous prime is 20264381. The next prime is 20264389. The reversal of 20264385 is 58346202.

It is an interprime number because it is at equal distance from previous prime (20264381) and next prime (20264389).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20264385 - 2² = 20264381 is a prime.

It is a super-3 number, since 3×20264385³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20264381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 675465 + ... + 675494.

It is an arithmetic number, because the mean of its divisors is an integer number (4052880).

Almost surely, 2^20264385 is an apocalyptic number.

It is an amenable number.

20264385 is a deficient number, since it is larger than the sum of its proper divisors (12158655).

20264385 is a wasteful number, since it uses less digits than its factorization.

20264385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1350967.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 20264385 is about 4501.5980495819. The cubic root of 20264385 is about 272.6326150795.

The spelling of 20264385 in words is "twenty million, two hundred sixty-four thousand, three hundred eighty-five".