20501093 has 4 divisors (see below), whose sum is σ = 20692800. Its totient is φ = 20309388.

The previous prime is 20501069. The next prime is 20501123. The reversal of 20501093 is 39010502.

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, and also an emirpimes, since its reverse is a distinct semiprime: 39010502 = 2 ⋅19505251.

It is a cyclic number.

It is not a de Polignac number, because 20501093 - 2⁶ = 20501029 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 (20501023) 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, 95693 + ... + 95906.

It is an arithmetic number, because the mean of its divisors is an integer number (5173200).

Almost surely, 2^20501093 is an apocalyptic number.

It is an amenable number.

20501093 is a deficient number, since it is larger than the sum of its proper divisors (191707).

20501093 is a wasteful number, since it uses less digits than its factorization.

20501093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191706.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 20501093 is about 4527.8132691179. The cubic root of 20501093 is about 273.6900476845.

Adding to 20501093 its reverse (39010502), we get a palindrome (59511595).

The spelling of 20501093 in words is "twenty million, five hundred one thousand, ninety-three".