1020505419 has 8 divisors (see below), whose sum is σ = 1511859920. Its totient is φ = 680336928.

The previous prime is 1020505403. The next prime is 1020505429. The reversal of 1020505419 is 9145050201.

It is not a de Polignac number, because 1020505419 - 2⁴ = 1020505403 is a prime.

It is a super-2 number, since 2×1020505419² = 2082862620416731122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 37796497 = 1020505419 / (1 + 0 + 2 + 0 + 5 + 0 + 5 + 4 + 1 + 9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020505392 and 1020505401.

It is not an unprimeable number, because it can be changed into a prime (1020505429) 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, 18898222 + ... + 18898275.

It is an arithmetic number, because the mean of its divisors is an integer number (188982490).

Almost surely, 2^1020505419 is an apocalyptic number.

1020505419 is a deficient number, since it is larger than the sum of its proper divisors (491354501).

1020505419 is an equidigital number, since it uses as much as digits as its factorization.

1020505419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37796506 (or 37796500 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 1020505419 is about 31945.3505067639. The cubic root of 1020505419 is about 1006.7889455842.

The spelling of 1020505419 in words is "one billion, twenty million, five hundred five thousand, four hundred nineteen".