21603151353516 has 24 divisors (see below), whose sum is σ = 50508369912000. Its totient is φ = 7186619486352.

The previous prime is 21603151353499. The next prime is 21603151353517. The reversal of 21603151353516 is 61535315130612.

It is a super-2 number, since 2×21603151353516² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21603151353517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1803864366 + ... + 1803876341.

It is an arithmetic number, because the mean of its divisors is an integer number (2104515413000).

Almost surely, 2^{21603151353516} is an apocalyptic number.

It is an amenable number.

21603151353516 is an abundant number, since it is smaller than the sum of its proper divisors (28905218558484).

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

21603151353516 is a wasteful number, since it uses less digits than its factorization.

21603151353516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3607741213 (or 3607741211 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 42.

The spelling of 21603151353516 in words is "twenty-one trillion, six hundred three billion, one hundred fifty-one million, three hundred fifty-three thousand, five hundred sixteen".