20401047878703 has 16 divisors (see below), whose sum is σ = 28712807481600. Its totient is φ = 12848981322240.

The previous prime is 20401047878699. The next prime is 20401047878713. The reversal of 20401047878703 is 30787874010402.

It is not a de Polignac number, because 20401047878703 - 2² = 20401047878699 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401047878713) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 498465778 + ... + 498506703.

It is an arithmetic number, because the mean of its divisors is an integer number (1794550467600).

Almost surely, 2^{20401047878703} is an apocalyptic number.

20401047878703 is a deficient number, since it is larger than the sum of its proper divisors (8311759602897).

20401047878703 is a wasteful number, since it uses less digits than its factorization.

20401047878703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996972862.

The product of its (nonzero) digits is 2107392, while the sum is 51.

The spelling of 20401047878703 in words is "twenty trillion, four hundred one billion, forty-seven million, eight hundred seventy-eight thousand, seven hundred three".