20625243 has 8 divisors (see below), whose sum is σ = 28243728. Its totient is φ = 13378464.

The previous prime is 20625239. The next prime is 20625257. The reversal of 20625243 is 34252602.

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

It is not a de Polignac number, because 20625243 - 2² = 20625239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20625263) 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, 92796 + ... + 93017.

It is an arithmetic number, because the mean of its divisors is an integer number (3530466).

Almost surely, 2^20625243 is an apocalyptic number.

20625243 is a deficient number, since it is larger than the sum of its proper divisors (7618485).

20625243 is a wasteful number, since it uses less digits than its factorization.

20625243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185853.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 20625243 is about 4541.5022844869. The cubic root of 20625243 is about 274.2414046340.

Adding to 20625243 its reverse (34252602), we get a palindrome (54877845).

The spelling of 20625243 in words is "twenty million, six hundred twenty-five thousand, two hundred forty-three".