19820377420 has 48 divisors (see below), whose sum is σ = 44144549568. Its totient is φ = 7459119360.

The previous prime is 19820377411. The next prime is 19820377517. The reversal of 19820377420 is 2477302891.

It is a super-2 number, since 2×19820377420² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325119 + ... + 381238.

It is an arithmetic number, because the mean of its divisors is an integer number (919678116).

Almost surely, 2^19820377420 is an apocalyptic number.

19820377420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19820377420 is an abundant number, since it is smaller than the sum of its proper divisors (24324172148).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19820377420 is a wasteful number, since it uses less digits than its factorization.

19820377420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706450 (or 706448 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 19820377420 in words is "nineteen billion, eight hundred twenty million, three hundred seventy-seven thousand, four hundred twenty".