21498696510 has 16 divisors (see below), whose sum is σ = 51596871696. Its totient is φ = 5732985728.

The previous prime is 21498696493. The next prime is 21498696529. The reversal of 21498696510 is 1569689412.

It is a congruent number.

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, 358311579 + ... + 358311638.

It is an arithmetic number, because the mean of its divisors is an integer number (3224804481).

Almost surely, 2^21498696510 is an apocalyptic number.

21498696510 is an abundant number, since it is smaller than the sum of its proper divisors (30098175186).

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

21498696510 is a wasteful number, since it uses less digits than its factorization.

21498696510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716623227.

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 21498696510 in words is "twenty-one billion, four hundred ninety-eight million, six hundred ninety-six thousand, five hundred ten".