20151105419 has 2 divisors, whose sum is σ = 20151105420. Its totient is φ = 20151105418.

The previous prime is 20151105371. The next prime is 20151105463. The reversal of 20151105419 is 91450115102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20151105419 is a prime.

It is a super-2 number, since 2×20151105419² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20151105391 and 20151105400.

It is not a weakly prime, because it can be changed into another prime (20151105479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10075552709 + 10075552710.

It is an arithmetic number, because the mean of its divisors is an integer number (10075552710).

Almost surely, 2^20151105419 is an apocalyptic number.

20151105419 is a deficient number, since it is larger than the sum of its proper divisors (1).

20151105419 is an equidigital number, since it uses as much as digits as its factorization.

20151105419 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 29.

The spelling of 20151105419 in words is "twenty billion, one hundred fifty-one million, one hundred five thousand, four hundred nineteen".