20706330 has 32 divisors (see below), whose sum is σ = 50004864. Its totient is φ = 5487296.

The previous prime is 20706311. The next prime is 20706341. The reversal of 20706330 is 3360702.

It is a junction number, because it is equal to n+sod(n) for n = 20706297 and 20706306.

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, 2944 + ... + 7076.

It is an arithmetic number, because the mean of its divisors is an integer number (1562652).

Almost surely, 2^20706330 is an apocalyptic number.

20706330 is an abundant number, since it is smaller than the sum of its proper divisors (29298534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20706330 is a wasteful number, since it uses less digits than its factorization.

20706330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4310.

The product of its (nonzero) digits is 756, while the sum is 21.

The square root of 20706330 is about 4550.4208596568. The cubic root of 20706330 is about 274.6003229837.

The spelling of 20706330 in words is "twenty million, seven hundred six thousand, three hundred thirty".