19485642420 has 96 divisors (see below), whose sum is σ = 64188028800. Its totient is φ = 4890511872.

The previous prime is 19485642313. The next prime is 19485642509. The reversal of 19485642420 is 2424658491.

It is a happy number.

19485642420 is a `hidden beast` number, since 1 + 9 + 48 + 564 + 2 + 42 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1052130 + ... + 1070489.

It is an arithmetic number, because the mean of its divisors is an integer number (668625300).

Almost surely, 2^19485642420 is an apocalyptic number.

19485642420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19485642420 is an abundant number, since it is smaller than the sum of its proper divisors (44702386380).

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

19485642420 is a wasteful number, since it uses less digits than its factorization.

19485642420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122654 (or 2122646 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 45.

The spelling of 19485642420 in words is "nineteen billion, four hundred eighty-five million, six hundred forty-two thousand, four hundred twenty".