21000150552 has 64 divisors (see below), whose sum is σ = 54800789760. Its totient is φ = 6693526400.

The previous prime is 21000150551. The next prime is 21000150559. The reversal of 21000150552 is 25505100012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000150551) 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, 3232027 + ... + 3238517.

It is an arithmetic number, because the mean of its divisors is an integer number (856262340).

Almost surely, 2^21000150552 is an apocalyptic number.

It is an amenable number.

21000150552 is an abundant number, since it is smaller than the sum of its proper divisors (33800639208).

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

21000150552 is a wasteful number, since it uses less digits than its factorization.

21000150552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12384 (or 12380 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

Adding to 21000150552 its reverse (25505100012), we get a palindrome (46505250564).

The spelling of 21000150552 in words is "twenty-one billion, one hundred fifty thousand, five hundred fifty-two".