20948493 has 4 divisors (see below), whose sum is σ = 27931328. Its totient is φ = 13965660.

The previous prime is 20948491. The next prime is 20948497. The reversal of 20948493 is 39484902.

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 not a de Polignac number, because 20948493 - 2¹ = 20948491 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 (20948491) 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, 3491413 + ... + 3491418.

It is an arithmetic number, because the mean of its divisors is an integer number (6982832).

Almost surely, 2^20948493 is an apocalyptic number.

It is an amenable number.

20948493 is a deficient number, since it is larger than the sum of its proper divisors (6982835).

20948493 is an equidigital number, since it uses as much as digits as its factorization.

20948493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6982834.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 20948493 is about 4576.9523703006. The cubic root of 20948493 is about 275.6666712155. Note that the first 4 decimals are identical.

The spelling of 20948493 in words is "twenty million, nine hundred forty-eight thousand, four hundred ninety-three".