20776390 has 8 divisors (see below), whose sum is σ = 37397520. Its totient is φ = 8310552.

The previous prime is 20776361. The next prime is 20776421. The reversal of 20776390 is 9367702.

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

It is a congruent number.

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, 1038810 + ... + 1038829.

It is an arithmetic number, because the mean of its divisors is an integer number (4674690).

Almost surely, 2^20776390 is an apocalyptic number.

20776390 is a deficient number, since it is larger than the sum of its proper divisors (16621130).

20776390 is a wasteful number, since it uses less digits than its factorization.

20776390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077646.

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 20776390 is about 4558.1125479742. The cubic root of 20776390 is about 274.9096783268.

The spelling of 20776390 in words is "twenty million, seven hundred seventy-six thousand, three hundred ninety".