20380733 has 12 divisors (see below), whose sum is σ = 21533568. Its totient is φ = 19266720.

The previous prime is 20380721. The next prime is 20380769. The reversal of 20380733 is 33708302.

It is not a de Polignac number, because 20380733 - 2¹² = 20376637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20380033) 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, 228953 + ... + 229041.

It is an arithmetic number, because the mean of its divisors is an integer number (1794464).

Almost surely, 2^20380733 is an apocalyptic number.

It is an amenable number.

20380733 is a deficient number, since it is larger than the sum of its proper divisors (1152835).

20380733 is an frugal number, since it uses more digits than its factorization.

20380733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 20380733 is about 4514.5025196582. The cubic root of 20380733 is about 273.1533932015.

The spelling of 20380733 in words is "twenty million, three hundred eighty thousand, seven hundred thirty-three".