20780926 has 8 divisors (see below), whose sum is σ = 31447584. Its totient is φ = 10298400.

The previous prime is 20780887. The next prime is 20780941. The reversal of 20780926 is 62908702.

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

It is a junction number, because it is equal to n+sod(n) for n = 20780891 and 20780900.

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, 45750 + ... + 46201.

It is an arithmetic number, because the mean of its divisors is an integer number (3930948).

Almost surely, 2^20780926 is an apocalyptic number.

20780926 is a deficient number, since it is larger than the sum of its proper divisors (10666658).

20780926 is a wasteful number, since it uses less digits than its factorization.

20780926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92066.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 20780926 is about 4558.6100951935. The cubic root of 20780926 is about 274.9296833992.

The spelling of 20780926 in words is "twenty million, seven hundred eighty thousand, nine hundred twenty-six".