21282737801 has 32 divisors (see below), whose sum is σ = 25035147648. Its totient is φ = 17914659840.

The previous prime is 21282737789. The next prime is 21282737803. The reversal of 21282737801 is 10873728212.

21282737801 = T₅₀₀₃₀ + T₅₀₀₃₁ + ... + T₅₀₀₄₆.

It is a de Polignac number, because none of the positive numbers 2^k-21282737801 is a prime.

It is a super-2 number, since 2×21282737801² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21282737803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 891446 + ... + 915008.

It is an arithmetic number, because the mean of its divisors is an integer number (782348364).

Almost surely, 2^21282737801 is an apocalyptic number.

It is an amenable number.

21282737801 is a deficient number, since it is larger than the sum of its proper divisors (3752409847).

21282737801 is a wasteful number, since it uses less digits than its factorization.

21282737801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23721.

The product of its (nonzero) digits is 75264, while the sum is 41.

The spelling of 21282737801 in words is "twenty-one billion, two hundred eighty-two million, seven hundred thirty-seven thousand, eight hundred one".