21501435514 has 16 divisors (see below), whose sum is σ = 35853511680. Its totient is φ = 9603618480.

The previous prime is 21501435509. The next prime is 21501435521. The reversal of 21501435514 is 41553410512.

It is a Harshad number since it is a multiple of its sum of digits (31).

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, 13337554 + ... + 13339165.

It is an arithmetic number, because the mean of its divisors is an integer number (2240844480).

Almost surely, 2^21501435514 is an apocalyptic number.

21501435514 is a deficient number, since it is larger than the sum of its proper divisors (14352076166).

21501435514 is a wasteful number, since it uses less digits than its factorization.

21501435514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26676765.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 21501435514 in words is "twenty-one billion, five hundred one million, four hundred thirty-five thousand, five hundred fourteen".