19540457372 has 6 divisors (see below), whose sum is σ = 34195800408. Its totient is φ = 9770228684.

The previous prime is 19540457357. The next prime is 19540457399. The reversal of 19540457372 is 27375404591.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2442557168 + ... + 2442557175.

It is an arithmetic number, because the mean of its divisors is an integer number (5699300068).

Almost surely, 2^19540457372 is an apocalyptic number.

It is an amenable number.

19540457372 is a deficient number, since it is larger than the sum of its proper divisors (14655343036).

19540457372 is a wasteful number, since it uses less digits than its factorization.

19540457372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4885114347 (or 4885114345 counting only the distinct ones).

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 19540457372 in words is "nineteen billion, five hundred forty million, four hundred fifty-seven thousand, three hundred seventy-two".