20900030 has 8 divisors (see below), whose sum is σ = 37620072. Its totient is φ = 8360008.

The previous prime is 20899993. The next prime is 20900051. The reversal of 20900030 is 3000902.

It is a happy number.

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

It is a super-2 number, since 2×20900030² = 873622508001800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20899978 and 20900014.

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, 1044992 + ... + 1045011.

It is an arithmetic number, because the mean of its divisors is an integer number (4702509).

Almost surely, 2^20900030 is an apocalyptic number.

20900030 is a deficient number, since it is larger than the sum of its proper divisors (16720042).

20900030 is a wasteful number, since it uses less digits than its factorization.

20900030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090010.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 20900030 is about 4571.6550613536. The cubic root of 20900030 is about 275.4539279987.

Adding to 20900030 its reverse (3000902), we get a palindrome (23900932).

The spelling of 20900030 in words is "twenty million, nine hundred thousand, thirty".