20951029 has 6 divisors (see below), whose sum is σ = 23028950. Its totient is φ = 19046280.

The previous prime is 20951027. The next prime is 20951083. The reversal of 20951029 is 92015902.

It can be written as a sum of positive squares in only one way, i.e., 17656804 + 3294225 = 4202^2 + 1815^2 .

It is not a de Polignac number, because 20951029 - 2¹ = 20951027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20950988 and 20951006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20951023) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 86454 + ... + 86695.

Almost surely, 2^20951029 is an apocalyptic number.

It is an amenable number.

20951029 is a deficient number, since it is larger than the sum of its proper divisors (2077921).

20951029 is a wasteful number, since it uses less digits than its factorization.

20951029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173171 (or 173160 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 20951029 is about 4577.2294021602. The cubic root of 20951029 is about 275.6777947280.

The spelling of 20951029 in words is "twenty million, nine hundred fifty-one thousand, twenty-nine".