19006057780 has 24 divisors (see below), whose sum is σ = 40324196808. Its totient is φ = 7524046848.

The previous prime is 19006057771. The next prime is 19006057879. The reversal of 19006057780 is 8775060091.

It can be written as a sum of positive squares in 4 ways, for example, as 126736 + 19005931044 = 356^2 + 137862^2 .

It is a super-2 number, since 2×19006057780² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4896529 + ... + 4900408.

It is an arithmetic number, because the mean of its divisors is an integer number (1680174867).

Almost surely, 2^19006057780 is an apocalyptic number.

19006057780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19006057780 is an abundant number, since it is smaller than the sum of its proper divisors (21318139028).

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

19006057780 is a wasteful number, since it uses less digits than its factorization.

19006057780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9797043 (or 9797041 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 43.

The spelling of 19006057780 in words is "nineteen billion, six million, fifty-seven thousand, seven hundred eighty".