21201945093340 has 24 divisors (see below), whose sum is σ = 48571728759792. Its totient is φ = 7709798215680.

The previous prime is 21201945093337. The next prime is 21201945093341. The reversal of 21201945093340 is 4339054910212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21201945093341) 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, 48186238629 + ... + 48186239068.

It is an arithmetic number, because the mean of its divisors is an integer number (2023822031658).

Almost surely, 2^{21201945093340} is an apocalyptic number.

21201945093340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21201945093340 is an abundant number, since it is smaller than the sum of its proper divisors (27369783666452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21201945093340 is a wasteful number, since it uses less digits than its factorization.

21201945093340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96372477717 (or 96372477715 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 21201945093340 in words is "twenty-one trillion, two hundred one billion, nine hundred forty-five million, ninety-three thousand, three hundred forty".