19400478974 has 16 divisors (see below), whose sum is σ = 29856934800. Its totient is φ = 9448904640.

The previous prime is 19400478973. The next prime is 19400478997. The reversal of 19400478974 is 47987400491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19400478971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131249 + ... + 236700.

It is an arithmetic number, because the mean of its divisors is an integer number (1866058425).

Almost surely, 2^19400478974 is an apocalyptic number.

19400478974 is a deficient number, since it is larger than the sum of its proper divisors (10456455826).

19400478974 is a wasteful number, since it uses less digits than its factorization.

19400478974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368635.

The product of its (nonzero) digits is 2032128, while the sum is 53.

The spelling of 19400478974 in words is "nineteen billion, four hundred million, four hundred seventy-eight thousand, nine hundred seventy-four".