20146628 has 6 divisors (see below), whose sum is σ = 35256606. Its totient is φ = 10073312.

The previous prime is 20146627. The next prime is 20146639. The reversal of 20146628 is 82664102.

It can be written as a sum of positive squares in only one way, i.e., 15745024 + 4401604 = 3968^2 + 2098^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20146628.

It is not an unprimeable number, because it can be changed into a prime (20146627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2518325 + ... + 2518332.

It is an arithmetic number, because the mean of its divisors is an integer number (5876101).

Almost surely, 2^20146628 is an apocalyptic number.

It is an amenable number.

20146628 is a deficient number, since it is larger than the sum of its proper divisors (15109978).

20146628 is a wasteful number, since it uses less digits than its factorization.

20146628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5036661 (or 5036659 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 20146628 is about 4488.4995265679. The cubic root of 20146628 is about 272.1034965140.

The spelling of 20146628 in words is "twenty million, one hundred forty-six thousand, six hundred twenty-eight".