21770738814 has 32 divisors (see below), whose sum is σ = 48072092544. Its totient is φ = 6517707680.

The previous prime is 21770738813. The next prime is 21770738819. The reversal of 21770738814 is 41883707712.

It is a super-2 number, since 2×21770738814² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21770738813) by changing a digit.

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, 1981629 + ... + 1992584.

It is an arithmetic number, because the mean of its divisors is an integer number (1502252892).

Almost surely, 2^21770738814 is an apocalyptic number.

21770738814 is an abundant number, since it is smaller than the sum of its proper divisors (26301353730).

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

21770738814 is a wasteful number, since it uses less digits than its factorization.

21770738814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3974312.

The product of its (nonzero) digits is 526848, while the sum is 48.

The spelling of 21770738814 in words is "twenty-one billion, seven hundred seventy million, seven hundred thirty-eight thousand, eight hundred fourteen".