20211428519 has 4 divisors (see below), whose sum is σ = 20908374360. Its totient is φ = 19514482680.

The previous prime is 20211428491. The next prime is 20211428527. The reversal of 20211428519 is 91582411202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20211428519 is a prime.

It is a super-2 number, since 2×20211428519² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211428539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 348472877 + ... + 348472934.

It is an arithmetic number, because the mean of its divisors is an integer number (5227093590).

Almost surely, 2^20211428519 is an apocalyptic number.

20211428519 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20211428519 is a deficient number, since it is larger than the sum of its proper divisors (696945841).

20211428519 is an equidigital number, since it uses as much as digits as its factorization.

20211428519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696945840.

The product of its (nonzero) digits is 11520, while the sum is 35.

The spelling of 20211428519 in words is "twenty billion, two hundred eleven million, four hundred twenty-eight thousand, five hundred nineteen".