21769943019 has 32 divisors (see below), whose sum is σ = 32625552384. Its totient is φ = 12798804480.

The previous prime is 21769942993. The next prime is 21769943029. The reversal of 21769943019 is 91034996712.

It is not a de Polignac number, because 21769943019 - 2⁷ = 21769942891 is a prime.

It is a super-2 number, since 2×21769943019² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21769943029) 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, 113157 + ... + 237369.

It is an arithmetic number, because the mean of its divisors is an integer number (1019548512).

Almost surely, 2^21769943019 is an apocalyptic number.

21769943019 is a deficient number, since it is larger than the sum of its proper divisors (10855609365).

21769943019 is a wasteful number, since it uses less digits than its factorization.

21769943019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124387.

The product of its (nonzero) digits is 734832, while the sum is 51.

The spelling of 21769943019 in words is "twenty-one billion, seven hundred sixty-nine million, nine hundred forty-three thousand, nineteen".