20051698 has 8 divisors (see below), whose sum is σ = 30209580. Its totient is φ = 9981840.

The previous prime is 20051683. The next prime is 20051711. The reversal of 20051698 is 89615002.

It can be written as a sum of positive squares in 2 ways, for example, as 13564489 + 6487209 = 3683^2 + 2547^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21433 + ... + 22348.

Almost surely, 2^20051698 is an apocalyptic number.

20051698 is a deficient number, since it is larger than the sum of its proper divisors (10157882).

20051698 is a wasteful number, since it uses less digits than its factorization.

20051698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44012.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 20051698 is about 4477.9122367460. The cubic root of 20051698 is about 271.6754436967.

The spelling of 20051698 in words is "twenty million, fifty-one thousand, six hundred ninety-eight".