20340064478 has 8 divisors (see below), whose sum is σ = 30515013480. Its totient is φ = 10168393320.

The previous prime is 20340064469. The next prime is 20340064499. The reversal of 20340064478 is 87446004302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 803888 + ... + 828803.

It is an arithmetic number, because the mean of its divisors is an integer number (3814376685).

Almost surely, 2^20340064478 is an apocalyptic number.

20340064478 is a deficient number, since it is larger than the sum of its proper divisors (10174949002).

20340064478 is a wasteful number, since it uses less digits than its factorization.

20340064478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638922.

The product of its (nonzero) digits is 129024, while the sum is 38.

The spelling of 20340064478 in words is "twenty billion, three hundred forty million, sixty-four thousand, four hundred seventy-eight".