20490038293 has 4 divisors (see below), whose sum is σ = 20490878880. Its totient is φ = 20489197708.

The previous prime is 20490038291. The next prime is 20490038297. The reversal of 20490038293 is 39283009402.

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 20490038293 - 2¹ = 20490038291 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 (20490038291) 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, 382603 + ... + 432856.

It is an arithmetic number, because the mean of its divisors is an integer number (5122719720).

Almost surely, 2^20490038293 is an apocalyptic number.

It is an amenable number.

20490038293 is a deficient number, since it is larger than the sum of its proper divisors (840587).

20490038293 is an equidigital number, since it uses as much as digits as its factorization.

20490038293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840586.

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 20490038293 in words is "twenty billion, four hundred ninety million, thirty-eight thousand, two hundred ninety-three".