21392800001 has 4 divisors (see below), whose sum is σ = 21604610004. Its totient is φ = 21180990000.

The previous prime is 21392799977. The next prime is 21392800003. The reversal of 21392800001 is 10000829312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16738149376 + 4654650625 = 129376^2 + 68225^2 .

It is a cyclic number.

It is not a de Polignac number, because 21392800001 - 2²² = 21388605697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21392800003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105904850 + ... + 105905051.

It is an arithmetic number, because the mean of its divisors is an integer number (5401152501).

Almost surely, 2^21392800001 is an apocalyptic number.

It is an amenable number.

21392800001 is a deficient number, since it is larger than the sum of its proper divisors (211810003).

21392800001 is a wasteful number, since it uses less digits than its factorization.

21392800001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211810002.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 21392800001 in words is "twenty-one billion, three hundred ninety-two million, eight hundred thousand, one".