20028051 has 6 divisors (see below), whose sum is σ = 28929420. Its totient is φ = 13352028.

The previous prime is 20028031. The next prime is 20028053. The reversal of 20028051 is 15082002.

It is a de Polignac number, because none of the positive numbers 2^k-20028051 is a prime.

It is a super-2 number, since 2×20028051² = 802245653717202, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20028053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1112661 + ... + 1112678.

It is an arithmetic number, because the mean of its divisors is an integer number (4821570).

Almost surely, 2^20028051 is an apocalyptic number.

20028051 is a deficient number, since it is larger than the sum of its proper divisors (8901369).

20028051 is a wasteful number, since it uses less digits than its factorization.

20028051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2225345 (or 2225342 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 20028051 is about 4475.2710532436. The cubic root of 20028051 is about 271.5686059238.

The spelling of 20028051 in words is "twenty million, twenty-eight thousand, fifty-one".