21406012702 has 16 divisors (see below), whose sum is σ = 32335950240. Its totient is φ = 10627614432.

The previous prime is 21406012699. The next prime is 21406012703. The reversal of 21406012702 is 20721060412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21406012703) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108183 + ... + 233485.

It is an arithmetic number, because the mean of its divisors is an integer number (2020996890).

Almost surely, 2^21406012702 is an apocalyptic number.

21406012702 is a deficient number, since it is larger than the sum of its proper divisors (10929937538).

21406012702 is a wasteful number, since it uses less digits than its factorization.

21406012702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125907.

The product of its (nonzero) digits is 1344, while the sum is 25.

The spelling of 21406012702 in words is "twenty-one billion, four hundred six million, twelve thousand, seven hundred two".