20704740 has 48 divisors (see below), whose sum is σ = 66256512. Its totient is φ = 4732416.

The previous prime is 20704729. The next prime is 20704763. The reversal of 20704740 is 4740702.

It is a super-3 number, since 3×20704740³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20704740.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24229 + ... + 25068.

It is an arithmetic number, because the mean of its divisors is an integer number (1380344).

Almost surely, 2^20704740 is an apocalyptic number.

20704740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20704740 is an abundant number, since it is smaller than the sum of its proper divisors (45551772).

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

20704740 is a wasteful number, since it uses less digits than its factorization.

20704740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49316 (or 49314 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 24.

The square root of 20704740 is about 4550.2461471881. The cubic root of 20704740 is about 274.5932941236.

The spelling of 20704740 in words is "twenty million, seven hundred four thousand, seven hundred forty".