20962109 has 4 divisors (see below), whose sum is σ = 23956704. Its totient is φ = 17967516.

The previous prime is 20962079. The next prime is 20962129. The reversal of 20962109 is 90126902.

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: 90126902 = 2 ⋅45063451.

It is not a de Polignac number, because 20962109 - 2¹² = 20958013 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 (20962129) 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, 1497287 + ... + 1497300.

It is an arithmetic number, because the mean of its divisors is an integer number (5989176).

Almost surely, 2^20962109 is an apocalyptic number.

It is an amenable number.

20962109 is a deficient number, since it is larger than the sum of its proper divisors (2994595).

20962109 is an equidigital number, since it uses as much as digits as its factorization.

20962109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2994594.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 20962109 is about 4578.4395813421. The cubic root of 20962109 is about 275.7263837760.

The spelling of 20962109 in words is "twenty million, nine hundred sixty-two thousand, one hundred nine".