21114444370 has 64 divisors (see below), whose sum is σ = 39377124864. Its totient is φ = 8146575360.

The previous prime is 21114444367. The next prime is 21114444371. The reversal of 21114444370 is 7344441112.

It is a happy number.

It is a super-2 number, since 2×21114444370² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21114444371) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17151655 + ... + 17152885.

It is an arithmetic number, because the mean of its divisors is an integer number (615267576).

Almost surely, 2^21114444370 is an apocalyptic number.

21114444370 is a deficient number, since it is larger than the sum of its proper divisors (18262680494).

21114444370 is a wasteful number, since it uses less digits than its factorization.

21114444370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747.

The product of its (nonzero) digits is 10752, while the sum is 31.

Adding to 21114444370 its reverse (7344441112), we get a palindrome (28458885482).

The spelling of 21114444370 in words is "twenty-one billion, one hundred fourteen million, four hundred forty-four thousand, three hundred seventy".