20803730 has 32 divisors (see below), whose sum is σ = 40435200. Its totient is φ = 7682752.

The previous prime is 20803729. The next prime is 20803777. The reversal of 20803730 is 3730802.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 20803696 and 20803705.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5111 + ... + 8229.

It is an arithmetic number, because the mean of its divisors is an integer number (1263600).

Almost surely, 2^20803730 is an apocalyptic number.

20803730 is a deficient number, since it is larger than the sum of its proper divisors (19631470).

20803730 is a wasteful number, since it uses less digits than its factorization.

20803730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3178.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 20803730 is about 4561.1106103667. The cubic root of 20803730 is about 275.0302115569.

The spelling of 20803730 in words is "twenty million, eight hundred three thousand, seven hundred thirty".