18950402419 has 16 divisors (see below), whose sum is σ = 21981836800. Its totient is φ = 16186607136.

The previous prime is 18950402407. The next prime is 18950402461. The reversal of 18950402419 is 91420405981.

It is a cyclic number.

It is not a de Polignac number, because 18950402419 - 2³¹ = 16802918771 is a prime.

It is a super-2 number, since 2×18950402419² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18950402479) 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, 881499 + ... + 902740.

It is an arithmetic number, because the mean of its divisors is an integer number (1373864800).

Almost surely, 2^18950402419 is an apocalyptic number.

18950402419 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18950402419 is a deficient number, since it is larger than the sum of its proper divisors (3031434381).

18950402419 is a wasteful number, since it uses less digits than its factorization.

18950402419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784314.

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 18950402419 in words is "eighteen billion, nine hundred fifty million, four hundred two thousand, four hundred nineteen".