21503514030 has 32 divisors (see below), whose sum is σ = 54644225184. Its totient is φ = 5396960256.

The previous prime is 21503514029. The next prime is 21503514059. The reversal of 21503514030 is 3041530512.

It is a super-2 number, since 2×21503514030² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21081367 + ... + 21082386.

It is an arithmetic number, because the mean of its divisors is an integer number (1707632037).

Almost surely, 2^21503514030 is an apocalyptic number.

21503514030 is an abundant number, since it is smaller than the sum of its proper divisors (33140711154).

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

21503514030 is a wasteful number, since it uses less digits than its factorization.

21503514030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42163780.

The product of its (nonzero) digits is 1800, while the sum is 24.

The spelling of 21503514030 in words is "twenty-one billion, five hundred three million, five hundred fourteen thousand, thirty".