20515400219 has 8 divisors (see below), whose sum is σ = 21347219520. Its totient is φ = 19700052736.

The previous prime is 20515400203. The next prime is 20515400231. The reversal of 20515400219 is 91200451502.

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

It is a cyclic number.

It is not a de Polignac number, because 20515400219 - 2⁴ = 20515400203 is a prime.

It is a super-2 number, since 2×20515400219² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20515400191 and 20515400200.

It is not an unprimeable number, because it can be changed into a prime (20515400299) 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, 4115414 + ... + 4120395.

It is an arithmetic number, because the mean of its divisors is an integer number (2668402440).

Almost surely, 2^20515400219 is an apocalyptic number.

20515400219 is a deficient number, since it is larger than the sum of its proper divisors (831819301).

20515400219 is an equidigital number, since it uses as much as digits as its factorization.

20515400219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8235909.

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 20515400219 in words is "twenty billion, five hundred fifteen million, four hundred thousand, two hundred nineteen".