20173030 has 16 divisors (see below), whose sum is σ = 36854640. Its totient is φ = 7948512.

The previous prime is 20172989. The next prime is 20173051. The reversal of 20173030 is 3037102.

It is a super-2 number, since 2×20173030² = 813902278761800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20172995 and 20173013.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14385 + ... + 15724.

It is an arithmetic number, because the mean of its divisors is an integer number (2303415).

Almost surely, 2^20173030 is an apocalyptic number.

20173030 is a deficient number, since it is larger than the sum of its proper divisors (16681610).

20173030 is a wasteful number, since it uses less digits than its factorization.

20173030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30183.

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 20173030 is about 4491.4396355734. The cubic root of 20173030 is about 272.2223078038. Note that the first 3 decimals are identical.

The spelling of 20173030 in words is "twenty million, one hundred seventy-three thousand, thirty".