21477320033740 has 48 divisors (see below), whose sum is σ = 46322042102784. Its totient is φ = 8358616800000.

The previous prime is 21477320033699. The next prime is 21477320033749. The reversal of 21477320033740 is 4733002377412.

It is a super-2 number, since 2×21477320033740² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21477320033749) 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, 61765365 + ... + 62112115.

It is an arithmetic number, because the mean of its divisors is an integer number (965042543808).

Almost surely, 2^{21477320033740} is an apocalyptic number.

21477320033740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21477320033740 is an abundant number, since it is smaller than the sum of its proper divisors (24844722069044).

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

21477320033740 is a wasteful number, since it uses less digits than its factorization.

21477320033740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430498 (or 430496 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 43.

The spelling of 21477320033740 in words is "twenty-one trillion, four hundred seventy-seven billion, three hundred twenty million, thirty-three thousand, seven hundred forty".