20628250 has 32 divisors (see below), whose sum is σ = 39021840. Its totient is φ = 8164800.

The previous prime is 20628247. The next prime is 20628271. The reversal of 20628250 is 5282602.

It can be written as a sum of positive squares in 8 ways, for example, as 2301289 + 18326961 = 1517^2 + 4281^2 .

It is a super-3 number, since 3×20628250³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26872 + ... + 27628.

Almost surely, 2^20628250 is an apocalyptic number.

20628250 is a deficient number, since it is larger than the sum of its proper divisors (18393590).

20628250 is a wasteful number, since it uses less digits than its factorization.

20628250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 883 (or 873 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 20628250 is about 4541.8333302753. The cubic root of 20628250 is about 274.2547314076.

The spelling of 20628250 in words is "twenty million, six hundred twenty-eight thousand, two hundred fifty".