20403361971 has 16 divisors (see below), whose sum is σ = 32005274400. Its totient is φ = 12802109184.

The previous prime is 20403361969. The next prime is 20403361991. The reversal of 20403361971 is 17916330402.

20403361971 is a `hidden beast` number, since 2 + 0 + 4 + 0 + 33 + 619 + 7 + 1 = 666.

It is not a de Polignac number, because 20403361971 - 2¹ = 20403361969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20403361931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22225426 + ... + 22226343.

It is an arithmetic number, because the mean of its divisors is an integer number (2000329650).

Almost surely, 2^20403361971 is an apocalyptic number.

20403361971 is a deficient number, since it is larger than the sum of its proper divisors (11601912429).

20403361971 is a wasteful number, since it uses less digits than its factorization.

20403361971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44451795 (or 44451789 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The spelling of 20403361971 in words is "twenty billion, four hundred three million, three hundred sixty-one thousand, nine hundred seventy-one".