20734146 has 24 divisors (see below), whose sum is σ = 45015984. Its totient is φ = 6897240.

The previous prime is 20734141. The next prime is 20734157. The reversal of 20734146 is 64143702.

It is not an unprimeable number, because it can be changed into a prime (20734141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11605 + ... + 13271.

It is an arithmetic number, because the mean of its divisors is an integer number (1875666).

Almost surely, 2^20734146 is an apocalyptic number.

20734146 is an abundant number, since it is smaller than the sum of its proper divisors (24281838).

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

20734146 is a wasteful number, since it uses less digits than its factorization.

20734146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2366 (or 2363 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20734146 is about 4553.4762544676. The cubic root of 20734146 is about 274.7232300822.

Adding to 20734146 its reverse (64143702), we get a palindrome (84877848).

The spelling of 20734146 in words is "twenty million, seven hundred thirty-four thousand, one hundred forty-six".