21373462450377 has 24 divisors (see below), whose sum is σ = 32691910965480. Its totient is φ = 13409533900800.

The previous prime is 21373462450337. The next prime is 21373462450399. The reversal of 21373462450377 is 77305426437312.

21373462450377 is a `hidden beast` number, since 2 + 1 + 3 + 7 + 3 + 4 + 62 + 4 + 503 + 77 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 11354851132416 + 10018611317961 = 3369696^2 + 3165219^2 .

It is not a de Polignac number, because 21373462450377 - 2²³ = 21373454061769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21373462450337) 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 23 ways as a sum of consecutive naturals, for example, 4966852 + ... + 8210757.

It is an arithmetic number, because the mean of its divisors is an integer number (1362162956895).

Almost surely, 2^{21373462450377} is an apocalyptic number.

It is an amenable number.

21373462450377 is a deficient number, since it is larger than the sum of its proper divisors (11318448515103).

21373462450377 is a wasteful number, since it uses less digits than its factorization.

21373462450377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13188233 (or 13188230 counting only the distinct ones).

The product of its (nonzero) digits is 17781120, while the sum is 54.

Adding to 21373462450377 its reverse (77305426437312), we get a palindrome (98678888887689).

The spelling of 21373462450377 in words is "twenty-one trillion, three hundred seventy-three billion, four hundred sixty-two million, four hundred fifty thousand, three hundred seventy-seven".