20938478401 has 8 divisors (see below), whose sum is σ = 22369467680. Its totient is φ = 19540385568.

The previous prime is 20938478387. The next prime is 20938478423. The reversal of 20938478401 is 10487483902.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20938478401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20938478461) 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, 8222796 + ... + 8225341.

It is an arithmetic number, because the mean of its divisors is an integer number (2796183460).

Almost surely, 2^20938478401 is an apocalyptic number.

It is an amenable number.

20938478401 is a deficient number, since it is larger than the sum of its proper divisors (1430989279).

20938478401 is a wasteful number, since it uses less digits than its factorization.

20938478401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16448223.

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 20938478401 in words is "twenty billion, nine hundred thirty-eight million, four hundred seventy-eight thousand, four hundred one".