20929692 has 48 divisors (see below), whose sum is σ = 56145152. Its totient is φ = 5944320.

The previous prime is 20929673. The next prime is 20929693. The reversal of 20929692 is 29692902.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20929692.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20929693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15567 + ... + 16857.

Almost surely, 2^20929692 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20929692, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28072576).

20929692 is an abundant number, since it is smaller than the sum of its proper divisors (35215460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20929692 is a wasteful number, since it uses less digits than its factorization.

20929692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498 (or 1496 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 20929692 is about 4574.8980316505. The cubic root of 20929692 is about 275.5841774476.

The spelling of 20929692 in words is "twenty million, nine hundred twenty-nine thousand, six hundred ninety-two".