20672093 has 4 divisors (see below), whose sum is σ = 22262268. Its totient is φ = 19081920.

The previous prime is 20672083. The next prime is 20672123. The reversal of 20672093 is 39027602.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9132484 + 11539609 = 3022^2 + 3397^2 .

It is not a de Polignac number, because 20672093 - 2¹⁶ = 20606557 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 (20672023) 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, 795068 + ... + 795093.

It is an arithmetic number, because the mean of its divisors is an integer number (5565567).

Almost surely, 2^20672093 is an apocalyptic number.

It is an amenable number.

20672093 is a deficient number, since it is larger than the sum of its proper divisors (1590175).

20672093 is a wasteful number, since it uses less digits than its factorization.

20672093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590174.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 20672093 is about 4546.6573435877. The cubic root of 20672093 is about 274.4488929995.

Adding to 20672093 its reverse (39027602), we get a palindrome (59699695).

The spelling of 20672093 in words is "twenty million, six hundred seventy-two thousand, ninety-three".