21234153019 has 8 divisors (see below), whose sum is σ = 22685349440. Its totient is φ = 19816317576.

The previous prime is 21234153007. The next prime is 21234153023. The reversal of 21234153019 is 91035143212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21234153019 is a prime.

It is a super-2 number, since 2×21234153019² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21234153319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8338929 + ... + 8341474.

It is an arithmetic number, because the mean of its divisors is an integer number (2835668680).

Almost surely, 2^21234153019 is an apocalyptic number.

21234153019 is a deficient number, since it is larger than the sum of its proper divisors (1451196421).

21234153019 is a wasteful number, since it uses less digits than its factorization.

21234153019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16680489.

The product of its (nonzero) digits is 6480, while the sum is 31.

The spelling of 21234153019 in words is "twenty-one billion, two hundred thirty-four million, one hundred fifty-three thousand, nineteen".