21203276739 has 32 divisors (see below), whose sum is σ = 29650698240. Its totient is φ = 13460752800.

The previous prime is 21203276729. The next prime is 21203276749. The reversal of 21203276739 is 93767230212.

It is an interprime number because it is at equal distance from previous prime (21203276729) and next prime (21203276749).

It is not a de Polignac number, because 21203276739 - 2⁴ = 21203276723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21203276739.

It is not an unprimeable number, because it can be changed into a prime (21203276729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11283402 + ... + 11285280.

It is an arithmetic number, because the mean of its divisors is an integer number (926584320).

Almost surely, 2^21203276739 is an apocalyptic number.

21203276739 is a deficient number, since it is larger than the sum of its proper divisors (8447421501).

21203276739 is a wasteful number, since it uses less digits than its factorization.

21203276739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3791.

The product of its (nonzero) digits is 190512, while the sum is 42.

The spelling of 21203276739 in words is "twenty-one billion, two hundred three million, two hundred seventy-six thousand, seven hundred thirty-nine".