20611028 has 24 divisors (see below), whose sum is σ = 37320360. Its totient is φ = 9953280.

The previous prime is 20611007. The next prime is 20611033. The reversal of 20611028 is 82011602.

It can be written as a sum of positive squares in 4 ways, for example, as 2650384 + 17960644 = 1628^2 + 4238^2 .

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, 17300 + ... + 18452.

It is an arithmetic number, because the mean of its divisors is an integer number (1555015).

Almost surely, 2^20611028 is an apocalyptic number.

It is an amenable number.

20611028 is a deficient number, since it is larger than the sum of its proper divisors (16709332).

20611028 is a wasteful number, since it uses less digits than its factorization.

20611028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307 (or 1305 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 20611028 is about 4539.9370039682. The cubic root of 20611028 is about 274.1783873967.

The spelling of 20611028 in words is "twenty million, six hundred eleven thousand, twenty-eight".