20736419 has 6 divisors (see below), whose sum is σ = 22638036. Its totient is φ = 18837560.

The previous prime is 20736407. The next prime is 20736431. The reversal of 20736419 is 91463702.

It is an interprime number because it is at equal distance from previous prime (20736407) and next prime (20736431).

It is not a de Polignac number, because 20736419 - 2¹² = 20732323 is a prime.

It is a super-2 number, since 2×20736419² = 859998145887122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20736319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14417 + ... + 15789.

It is an arithmetic number, because the mean of its divisors is an integer number (3773006).

Almost surely, 2^20736419 is an apocalyptic number.

20736419 is a deficient number, since it is larger than the sum of its proper divisors (1901617).

20736419 is an frugal number, since it uses more digits than its factorization.

20736419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2757 (or 1384 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 20736419 is about 4553.7258371580. The cubic root of 20736419 is about 274.7332686450.

The spelling of 20736419 in words is "twenty million, seven hundred thirty-six thousand, four hundred nineteen".