20929492 has 12 divisors (see below), whose sum is σ = 36661716. Its totient is φ = 10454720.

The previous prime is 20929487. The next prime is 20929501. The reversal of 20929492 is 29492902.

It can be written as a sum of positive squares in 2 ways, for example, as 13278736 + 7650756 = 3644^2 + 2766^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4158 + ... + 7690.

It is an arithmetic number, because the mean of its divisors is an integer number (3055143).

Almost surely, 2^20929492 is an apocalyptic number.

It is an amenable number.

20929492 is a deficient number, since it is larger than the sum of its proper divisors (15732224).

20929492 is a wasteful number, since it uses less digits than its factorization.

20929492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5018 (or 5016 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 20929492 is about 4574.8761731876. The cubic root of 20929492 is about 275.5832996355.

The spelling of 20929492 in words is "twenty million, nine hundred twenty-nine thousand, four hundred ninety-two".