20929942 has 8 divisors (see below), whose sum is σ = 34249032. Its totient is φ = 9513600.

The previous prime is 20929939. The next prime is 20929957. The reversal of 20929942 is 24992902.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 475659 + ... + 475702.

It is an arithmetic number, because the mean of its divisors is an integer number (4281129).

Almost surely, 2^20929942 is an apocalyptic number.

20929942 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20929942 is a deficient number, since it is larger than the sum of its proper divisors (13319090).

20929942 is a wasteful number, since it uses less digits than its factorization.

20929942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951374.

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

The square root of 20929942 is about 4574.9253545823. The cubic root of 20929942 is about 275.5852747049.

The spelling of 20929942 in words is "twenty million, nine hundred twenty-nine thousand, nine hundred forty-two".