20492930 has 8 divisors (see below), whose sum is σ = 36887292. Its totient is φ = 8197168.

The previous prime is 20492929. The next prime is 20492947. The reversal of 20492930 is 3929402.

It can be written as a sum of positive squares in 2 ways, for example, as 20097289 + 395641 = 4483^2 + 629^2 .

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 = 20492893 and 20492902.

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, 1024637 + ... + 1024656.

Almost surely, 2^20492930 is an apocalyptic number.

20492930 is a deficient number, since it is larger than the sum of its proper divisors (16394362).

20492930 is a wasteful number, since it uses less digits than its factorization.

20492930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049300.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 20492930 is about 4526.9117508518. The cubic root of 20492930 is about 273.6537174516.

The spelling of 20492930 in words is "twenty million, four hundred ninety-two thousand, nine hundred thirty".