21004055523132 has 48 divisors (see below), whose sum is σ = 53763555081600. Its totient is φ = 6329307396160.

The previous prime is 21004055523131. The next prime is 21004055523149. The reversal of 21004055523132 is 23132555040012.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 21004055523093 and 21004055523102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21004055523131) 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, 444450207 + ... + 444497462.

It is an arithmetic number, because the mean of its divisors is an integer number (1120074064200).

Almost surely, 2^{21004055523132} is an apocalyptic number.

21004055523132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21004055523132 is an abundant number, since it is smaller than the sum of its proper divisors (32759499558468).

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

21004055523132 is a wasteful number, since it uses less digits than its factorization.

21004055523132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888947866 (or 888947864 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The spelling of 21004055523132 in words is "twenty-one trillion, four billion, fifty-five million, five hundred twenty-three thousand, one hundred thirty-two".