10021453540 has 36 divisors (see below), whose sum is σ = 24480981756. Its totient is φ = 3435926592.

The previous prime is 10021453493. The next prime is 10021453553. The reversal of 10021453540 is 4535412001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6623029924 + 3398423616 = 81382^2 + 58296^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5112007 + ... + 5113966.

It is an arithmetic number, because the mean of its divisors is an integer number (680027271).

Almost surely, 2^10021453540 is an apocalyptic number.

10021453540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10021453540 is an abundant number, since it is smaller than the sum of its proper divisors (14459528216).

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

10021453540 is a wasteful number, since it uses less digits than its factorization.

10021453540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10225996 (or 10225987 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 10021453540 its reverse (4535412001), we get a palindrome (14556865541).

The spelling of 10021453540 in words is "ten billion, twenty-one million, four hundred fifty-three thousand, five hundred forty".