21189202419 has 32 divisors (see below), whose sum is σ = 35232293376. Its totient is φ = 11004664320.

The previous prime is 21189202409. The next prime is 21189202423. The reversal of 21189202419 is 91420298112.

It is a de Polignac number, because none of the positive numbers 2^k-21189202419 is a prime.

It is a super-2 number, since 2×21189202419² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21189202409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1214949 + ... + 1232265.

It is an arithmetic number, because the mean of its divisors is an integer number (1101009168).

Almost surely, 2^21189202419 is an apocalyptic number.

21189202419 is a deficient number, since it is larger than the sum of its proper divisors (14043090957).

21189202419 is a wasteful number, since it uses less digits than its factorization.

21189202419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22635.

The product of its (nonzero) digits is 20736, while the sum is 39.

The spelling of 21189202419 in words is "twenty-one billion, one hundred eighty-nine million, two hundred two thousand, four hundred nineteen".