20733497 has 4 divisors (see below), whose sum is σ = 20927376. Its totient is φ = 20539620.

The previous prime is 20733487. The next prime is 20733527. The reversal of 20733497 is 79433702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20733497 - 2⁴ = 20733481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20733467) 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, 96779 + ... + 96992.

It is an arithmetic number, because the mean of its divisors is an integer number (5231844).

Almost surely, 2^20733497 is an apocalyptic number.

It is an amenable number.

20733497 is a deficient number, since it is larger than the sum of its proper divisors (193879).

20733497 is a wasteful number, since it uses less digits than its factorization.

20733497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193878.

The product of its (nonzero) digits is 31752, while the sum is 35.

The square root of 20733497 is about 4553.4049896753. The cubic root of 20733497 is about 274.7203636795.

The spelling of 20733497 in words is "twenty million, seven hundred thirty-three thousand, four hundred ninety-seven".