20346530 has 32 divisors (see below), whose sum is σ = 38836800. Its totient is φ = 7653312.

The previous prime is 20346499. The next prime is 20346533. The reversal of 20346530 is 3564302.

It is a junction number, because it is equal to n+sod(n) for n = 20346496 and 20346505.

It is not an unprimeable number, because it can be changed into a prime (20346533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32561 + ... + 33179.

It is an arithmetic number, because the mean of its divisors is an integer number (1213650).

Almost surely, 2^20346530 is an apocalyptic number.

20346530 is a deficient number, since it is larger than the sum of its proper divisors (18490270).

20346530 is a wasteful number, since it uses less digits than its factorization.

20346530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 20346530 is about 4510.7128039812. The cubic root of 20346530 is about 273.0005053952. Note that the first 3 decimals are identical.

The spelling of 20346530 in words is "twenty million, three hundred forty-six thousand, five hundred thirty".