20610730 has 16 divisors (see below), whose sum is σ = 42399360. Its totient is φ = 7066512.

The previous prime is 20610727. The next prime is 20610757. The reversal of 20610730 is 3701602.

It is a super-2 number, since 2×20610730² = 849604382265800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20610698 and 20610707.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147150 + ... + 147289.

It is an arithmetic number, because the mean of its divisors is an integer number (2649960).

Almost surely, 2^20610730 is an apocalyptic number.

20610730 is an abundant number, since it is smaller than the sum of its proper divisors (21788630).

20610730 is a wasteful number, since it uses less digits than its factorization.

20610730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294453.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 20610730 is about 4539.9041840109. The cubic root of 20610730 is about 274.1770660078.

The spelling of 20610730 in words is "twenty million, six hundred ten thousand, seven hundred thirty".