21150015432032 has 48 divisors (see below), whose sum is σ = 42437258664192. Its totient is φ = 10372416737280.

The previous prime is 21150015432023. The next prime is 21150015432131. The reversal of 21150015432032 is 23023451005112.

It is a super-2 number, since 2×21150015432032² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21150015431986 and 21150015432004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3912368 + ... + 7589904.

It is an arithmetic number, because the mean of its divisors is an integer number (884109555504).

Almost surely, 2^{21150015432032} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21150015432032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21218629332096).

21150015432032 is an abundant number, since it is smaller than the sum of its proper divisors (21287243232160).

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

21150015432032 is a wasteful number, since it uses less digits than its factorization.

21150015432032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3680991 (or 3680983 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

Adding to 21150015432032 its reverse (23023451005112), we get a palindrome (44173466437144).

The spelling of 21150015432032 in words is "twenty-one trillion, one hundred fifty billion, fifteen million, four hundred thirty-two thousand, thirty-two".