21037990550401 has 8 divisors (see below), whose sum is σ = 22950859932000. Its totient is φ = 19125175299840.

The previous prime is 21037990550389. The next prime is 21037990550407. The reversal of 21037990550401 is 10405509973012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21037990550401 - 2²³ = 21037982161793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21037990550407) 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 7 ways as a sum of consecutive naturals, for example, 12717991 + ... + 14276668.

It is an arithmetic number, because the mean of its divisors is an integer number (2868857491500).

Almost surely, 2^{21037990550401} is an apocalyptic number.

It is an amenable number.

21037990550401 is a deficient number, since it is larger than the sum of its proper divisors (1912869381599).

21037990550401 is a wasteful number, since it uses less digits than its factorization.

21037990550401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27065519.

The product of its (nonzero) digits is 340200, while the sum is 46.

The spelling of 21037990550401 in words is "twenty-one trillion, thirty-seven billion, nine hundred ninety million, five hundred fifty thousand, four hundred one".