27019901973 has 16 divisors (see below), whose sum is σ = 36570813440. Its totient is φ = 17741226096.

The previous prime is 27019901933. The next prime is 27019901999. The reversal of 27019901973 is 37910991072.

It is a happy number.

It is not a de Polignac number, because 27019901973 - 2¹⁰ = 27019900949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27019901933) 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, 1742388 + ... + 1757826.

It is an arithmetic number, because the mean of its divisors is an integer number (2285675840).

Almost surely, 2^27019901973 is an apocalyptic number.

It is an amenable number.

27019901973 is a deficient number, since it is larger than the sum of its proper divisors (9550911467).

27019901973 is a wasteful number, since it uses less digits than its factorization.

27019901973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24216.

The product of its (nonzero) digits is 214326, while the sum is 48.

The spelling of 27019901973 in words is "twenty-seven billion, nineteen million, nine hundred one thousand, nine hundred seventy-three".