20473740 has 72 divisors (see below), whose sum is σ = 70980000. Its totient is φ = 4679424.

The previous prime is 20473723. The next prime is 20473751. The reversal of 20473740 is 4737402.

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, 6865 + ... + 9384.

Almost surely, 2^20473740 is an apocalyptic number.

20473740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20473740 is an abundant number, since it is smaller than the sum of its proper divisors (50506260).

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

20473740 is a wasteful number, since it uses less digits than its factorization.

20473740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16271 (or 16266 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 27.

The square root of 20473740 is about 4524.7917079132. The cubic root of 20473740 is about 273.5682724572.

The spelling of 20473740 in words is "twenty million, four hundred seventy-three thousand, seven hundred forty".