21426131070 has 64 divisors (see below), whose sum is σ = 57691146240. Its totient is φ = 5658155424.

The previous prime is 21426131057. The next prime is 21426131093. The reversal of 21426131070 is 7013162412.

21426131070 is a `hidden beast` number, since 2 + 1 + 42 + 613 + 1 + 0 + 7 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 357414 + ... + 413033.

It is an arithmetic number, because the mean of its divisors is an integer number (901424160).

Almost surely, 2^21426131070 is an apocalyptic number.

21426131070 is an abundant number, since it is smaller than the sum of its proper divisors (36265015170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21426131070 is a wasteful number, since it uses less digits than its factorization.

21426131070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770566 (or 770560 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

Adding to 21426131070 its reverse (7013162412), we get a palindrome (28439293482).

The spelling of 21426131070 in words is "twenty-one billion, four hundred twenty-six million, one hundred thirty-one thousand, seventy".