20951030 has 16 divisors (see below), whose sum is σ = 38102400. Its totient is φ = 8293632.

The previous prime is 20951027. The next prime is 20951083. The reversal of 20951030 is 3015902.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20950993 and 20951011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9830 + ... + 11769.

It is an arithmetic number, because the mean of its divisors is an integer number (2381400).

Almost surely, 2^20951030 is an apocalyptic number.

20951030 is a deficient number, since it is larger than the sum of its proper divisors (17151370).

20951030 is a wasteful number, since it uses less digits than its factorization.

20951030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21703.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 20951030 is about 4577.2295113966. The cubic root of 20951030 is about 275.6777991141.

Adding to 20951030 its reverse (3015902), we get a palindrome (23966932).

It can be divided in two parts, 2095 and 1030, that added together give a 5-th power (3125 = 5⁵).

The spelling of 20951030 in words is "twenty million, nine hundred fifty-one thousand, thirty".