20962819 has 4 divisors (see below), whose sum is σ = 22195944. Its totient is φ = 19729696.

The previous prime is 20962817. The next prime is 20962841. The reversal of 20962819 is 91826902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20962819 - 2¹ = 20962817 is a prime.

It is a super-2 number, since 2×20962819² = 878879560853522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20962811) 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, 616537 + ... + 616570.

It is an arithmetic number, because the mean of its divisors is an integer number (5548986).

Almost surely, 2^20962819 is an apocalyptic number.

20962819 is a deficient number, since it is larger than the sum of its proper divisors (1233125).

20962819 is a wasteful number, since it uses less digits than its factorization.

20962819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233124.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 20962819 is about 4578.5171180198. The cubic root of 20962819 is about 275.7294967504.

The spelling of 20962819 in words is "twenty million, nine hundred sixty-two thousand, eight hundred nineteen".