2021722739036 has 144 divisors (see below), whose sum is σ = 4779447482880. Its totient is φ = 726635669760.

The previous prime is 2021722738999. The next prime is 2021722739039. The reversal of 2021722739036 is 6309372271202.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021722739039) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 88945505 + ... + 88968231.

It is an arithmetic number, because the mean of its divisors is an integer number (33190607520).

Almost surely, 2^{2021722739036} is an apocalyptic number.

2021722739036 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021722739036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2389723741440).

2021722739036 is an abundant number, since it is smaller than the sum of its proper divisors (2757724743844).

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

2021722739036 is a wasteful number, since it uses less digits than its factorization.

2021722739036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24484 (or 24469 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 44.

The spelling of 2021722739036 in words is "two trillion, twenty-one billion, seven hundred twenty-two million, seven hundred thirty-nine thousand, thirty-six".