20253458 has 4 divisors (see below), whose sum is σ = 30380190. Its totient is φ = 10126728.

The previous prime is 20253451. The next prime is 20253469. The reversal of 20253458 is 85435202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17952169 + 2301289 = 4237^2 + 1517^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20253458.

It is not an unprimeable number, because it can be changed into a prime (20253451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5063363 + ... + 5063366.

Almost surely, 2^20253458 is an apocalyptic number.

20253458 is a deficient number, since it is larger than the sum of its proper divisors (10126732).

20253458 is a wasteful number, since it uses less digits than its factorization.

20253458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10126731.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 20253458 is about 4500.3842058207. The cubic root of 20253458 is about 272.5836031109.

The spelling of 20253458 in words is "twenty million, two hundred fifty-three thousand, four hundred fifty-eight".