20651252 has 24 divisors (see below), whose sum is σ = 38216640. Its totient is φ = 9737280.

The previous prime is 20651237. The next prime is 20651261. The reversal of 20651252 is 25215602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20873 + ... + 21839.

It is an arithmetic number, because the mean of its divisors is an integer number (1592360).

Almost surely, 2^20651252 is an apocalyptic number.

It is an amenable number.

20651252 is a deficient number, since it is larger than the sum of its proper divisors (17565388).

20651252 is a wasteful number, since it uses less digits than its factorization.

20651252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1271 (or 1269 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 20651252 is about 4544.3648621122. The cubic root of 20651252 is about 274.3566315365.

Adding to 20651252 its reverse (25215602), we get a palindrome (45866854).

The spelling of 20651252 in words is "twenty million, six hundred fifty-one thousand, two hundred fifty-two".