20742068 has 12 divisors (see below), whose sum is σ = 36517152. Its totient is φ = 10308600.

The previous prime is 20742041. The next prime is 20742077. The reversal of 20742068 is 86024702.

It is a self number, because there is not a number n which added to its sum of digits gives 20742068.

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, 14858 + ... + 16193.

It is an arithmetic number, because the mean of its divisors is an integer number (3043096).

Almost surely, 2^20742068 is an apocalyptic number.

It is an amenable number.

20742068 is a deficient number, since it is larger than the sum of its proper divisors (15775084).

20742068 is a wasteful number, since it uses less digits than its factorization.

20742068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31222 (or 31220 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 20742068 is about 4554.3460562412. The cubic root of 20742068 is about 274.7582139249.

The spelling of 20742068 in words is "twenty million, seven hundred forty-two thousand, sixty-eight".