733665021820 has 12 divisors (see below), whose sum is σ = 1540696545864. Its totient is φ = 293466008720.

The previous prime is 733665021809. The next prime is 733665021827. The reversal of 733665021820 is 28120566337.

It is a super-2 number, since 2×733665021820² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (733665021827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18341625526 + ... + 18341625565.

It is an arithmetic number, because the mean of its divisors is an integer number (128391378822).

Almost surely, 2^733665021820 is an apocalyptic number.

It is an amenable number.

733665021820 is an abundant number, since it is smaller than the sum of its proper divisors (807031524044).

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

733665021820 is a wasteful number, since it uses less digits than its factorization.

733665021820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36683251100 (or 36683251098 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 733665021820 in words is "seven hundred thirty-three billion, six hundred sixty-five million, twenty-one thousand, eight hundred twenty".