20980694 has 8 divisors (see below), whose sum is σ = 35966928. Its totient is φ = 8991720.

The previous prime is 20980681. The next prime is 20980699. The reversal of 20980694 is 49608902.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20980699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 749297 + ... + 749324.

It is an arithmetic number, because the mean of its divisors is an integer number (4495866).

Almost surely, 2^20980694 is an apocalyptic number.

20980694 is a deficient number, since it is larger than the sum of its proper divisors (14986234).

20980694 is a wasteful number, since it uses less digits than its factorization.

20980694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498630.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 20980694 is about 4580.4687533046. The cubic root of 20980694 is about 275.8078460177.

The spelling of 20980694 in words is "twenty million, nine hundred eighty thousand, six hundred ninety-four".