20929392 has 120 divisors (see below), whose sum is σ = 65131248. Its totient is φ = 6220800.

The previous prime is 20929373. The next prime is 20929409. The reversal of 20929392 is 29392902.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115542 + ... + 115722.

Almost surely, 2^20929392 is an apocalyptic number.

20929392 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20929392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32565624).

20929392 is an abundant number, since it is smaller than the sum of its proper divisors (44201856).

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

20929392 is a wasteful number, since it uses less digits than its factorization.

20929392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 20929392 is about 4574.8652439170. The cubic root of 20929392 is about 275.5828607274.

It can be divided in two parts, 20929 and 392, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 20929392 in words is "twenty million, nine hundred twenty-nine thousand, three hundred ninety-two".