21460533620 has 24 divisors (see below), whose sum is σ = 45070185888. Its totient is φ = 8583629600.

The previous prime is 21460533613. The next prime is 21460533641. The reversal of 21460533620 is 2633506412.

It is a super-6 number, since 6×21460533620⁶ (a number of 63 digits) contains 666666 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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381935 + ... + 434505.

It is an arithmetic number, because the mean of its divisors is an integer number (1877924412).

Almost surely, 2^21460533620 is an apocalyptic number.

21460533620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21460533620 is an abundant number, since it is smaller than the sum of its proper divisors (23609652268).

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

21460533620 is a wasteful number, since it uses less digits than its factorization.

21460533620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72991 (or 72989 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The spelling of 21460533620 in words is "twenty-one billion, four hundred sixty million, five hundred thirty-three thousand, six hundred twenty".