10203256644 has 96 divisors (see below), whose sum is σ = 28216608000. Its totient is φ = 2807723520.

The previous prime is 10203256621. The next prime is 10203256663. The reversal of 10203256644 is 44665230201.

It is a super-2 number, since 2×10203256644² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1020582 + ... + 1030530.

It is an arithmetic number, because the mean of its divisors is an integer number (293923000).

Almost surely, 2^10203256644 is an apocalyptic number.

10203256644 is a gapful number since it is divisible by the number (14) 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 10203256644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14108304000).

10203256644 is an abundant number, since it is smaller than the sum of its proper divisors (18013351356).

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

10203256644 is a wasteful number, since it uses less digits than its factorization.

10203256644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10413 (or 10411 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 10203256644 its reverse (44665230201), we get a palindrome (54868486845).

The spelling of 10203256644 in words is "ten billion, two hundred three million, two hundred fifty-six thousand, six hundred forty-four".