21494757145000 has 80 divisors (see below), whose sum is σ = 50615294796000. Its totient is φ = 8554696920000.

The previous prime is 21494757144979. The next prime is 21494757145003. The reversal of 21494757145000 is 54175749412.

It is a super-3 number, since 3×21494757145000³ (a number of 41 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21494757145003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9806386 + ... + 11796385.

It is an arithmetic number, because the mean of its divisors is an integer number (632691184950).

Almost surely, 2^{21494757145000} is an apocalyptic number.

21494757145000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21494757145000 is an abundant number, since it is smaller than the sum of its proper divisors (29120537651000).

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

21494757145000 is a wasteful number, since it uses less digits than its factorization.

21494757145000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21602996 (or 21602977 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 21494757145000 in words is "twenty-one trillion, four hundred ninety-four billion, seven hundred fifty-seven million, one hundred forty-five thousand".