20914849 has 4 divisors (see below), whose sum is σ = 21130564. Its totient is φ = 20699136.

The previous prime is 20914837. The next prime is 20914867. The reversal of 20914849 is 94841902.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94841902 = 2 ⋅47420951.

It can be written as a sum of positive squares in 2 ways, for example, as 3775249 + 17139600 = 1943^2 + 4140^2 .

It is a cyclic number.

It is not a de Polignac number, because 20914849 - 2⁷ = 20914721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20914349) 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, 107712 + ... + 107905.

It is an arithmetic number, because the mean of its divisors is an integer number (5282641).

Almost surely, 2^20914849 is an apocalyptic number.

It is an amenable number.

20914849 is a deficient number, since it is larger than the sum of its proper divisors (215715).

20914849 is an equidigital number, since it uses as much as digits as its factorization.

20914849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215714.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 20914849 is about 4573.2755219864. The cubic root of 20914849 is about 275.5190154233.

The spelling of 20914849 in words is "twenty million, nine hundred fourteen thousand, eight hundred forty-nine".