20253497 has 8 divisors (see below), whose sum is σ = 22425312. Its totient is φ = 18136800.

The previous prime is 20253469. The next prime is 20253521. The reversal of 20253497 is 79435202.

It is a happy number.

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

It is not a de Polignac number, because 20253497 - 2⁶ = 20253433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20253407) 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, 13004 + ... + 14477.

It is an arithmetic number, because the mean of its divisors is an integer number (2803164).

Almost surely, 2^20253497 is an apocalyptic number.

It is an amenable number.

20253497 is a deficient number, since it is larger than the sum of its proper divisors (2171815).

20253497 is a wasteful number, since it uses less digits than its factorization.

20253497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27559.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 20253497 is about 4500.3885387820. The cubic root of 20253497 is about 272.5837780729.

Adding to 20253497 its reverse (79435202), we get a palindrome (99688699).

The spelling of 20253497 in words is "twenty million, two hundred fifty-three thousand, four hundred ninety-seven".