20733842 has 8 divisors (see below), whose sum is σ = 31128636. Its totient is φ = 10357632.

The previous prime is 20733841. The next prime is 20733857. The reversal of 20733842 is 24833702.

It can be written as a sum of positive squares in 2 ways, for example, as 20421361 + 312481 = 4519^2 + 559^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20733841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1403 + ... + 6590.

Almost surely, 2^20733842 is an apocalyptic number.

20733842 is a deficient number, since it is larger than the sum of its proper divisors (10394794).

20733842 is a wasteful number, since it uses less digits than its factorization.

20733842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9292.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 20733842 is about 4553.4428732554. The cubic root of 20733842 is about 274.7218874295.

The spelling of 20733842 in words is "twenty million, seven hundred thirty-three thousand, eight hundred forty-two".