21203134419 has 16 divisors (see below), whose sum is σ = 29054218752. Its totient is φ = 13744244448.

The previous prime is 21203134411. The next prime is 21203134423. The reversal of 21203134419 is 91443130212.

It is not a de Polignac number, because 21203134419 - 2³ = 21203134411 is a prime.

It is a super-2 number, since 2×21203134419² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21203134411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106342 + ... + 231764.

It is an arithmetic number, because the mean of its divisors is an integer number (1815888672).

Almost surely, 2^21203134419 is an apocalyptic number.

21203134419 is a deficient number, since it is larger than the sum of its proper divisors (7851084333).

21203134419 is a wasteful number, since it uses less digits than its factorization.

21203134419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126986.

The product of its (nonzero) digits is 5184, while the sum is 30.

The spelling of 21203134419 in words is "twenty-one billion, two hundred three million, one hundred thirty-four thousand, four hundred nineteen".