21142343002 has 16 divisors (see below), whose sum is σ = 34599376800. Its totient is φ = 9609373840.

The previous prime is 21142342987. The next prime is 21142343039. The reversal of 21142343002 is 20034324112.

It is a super-2 number, since 2×21142343002² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304449 + ... + 367387.

It is an arithmetic number, because the mean of its divisors is an integer number (2162461050).

Almost surely, 2^21142343002 is an apocalyptic number.

21142343002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21142343002 is a deficient number, since it is larger than the sum of its proper divisors (13457033798).

21142343002 is a wasteful number, since it uses less digits than its factorization.

21142343002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78221.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21142343002 its reverse (20034324112), we get a palindrome (41176667114).

The spelling of 21142343002 in words is "twenty-one billion, one hundred forty-two million, three hundred forty-three thousand, two".