21942045254008 has 16 divisors (see below), whose sum is σ = 44881456201560. Its totient is φ = 9973656933600.

The previous prime is 21942045253993. The next prime is 21942045254009. The reversal of 21942045254008 is 80045254024912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21942045254009) 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, 124670711583 + ... + 124670711758.

Almost surely, 2^{21942045254008} is an apocalyptic number.

It is an amenable number.

21942045254008 is an abundant number, since it is smaller than the sum of its proper divisors (22939410947552).

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

21942045254008 is a wasteful number, since it uses less digits than its factorization.

21942045254008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249341423358 (or 249341423354 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 46.

The spelling of 21942045254008 in words is "twenty-one trillion, nine hundred forty-two billion, forty-five million, two hundred fifty-four thousand, eight".