21719141850 has 48 divisors (see below), whose sum is σ = 61558256448. Its totient is φ = 4964375040.

The previous prime is 21719141827. The next prime is 21719141867. The reversal of 21719141850 is 5814191712.

It is a super-2 number, since 2×21719141850² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21719141799 and 21719141808.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10341399 + ... + 10343498.

It is an arithmetic number, because the mean of its divisors is an integer number (1282463676).

Almost surely, 2^21719141850 is an apocalyptic number.

21719141850 is an abundant number, since it is smaller than the sum of its proper divisors (39839114598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21719141850 is a wasteful number, since it uses less digits than its factorization.

21719141850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20684919 (or 20684914 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 39.

The spelling of 21719141850 in words is "twenty-one billion, seven hundred nineteen million, one hundred forty-one thousand, eight hundred fifty".