21510510034 has 16 divisors (see below), whose sum is σ = 34756339968. Its totient is φ = 9925472592.

The previous prime is 21510510029. The next prime is 21510510037. The reversal of 21510510034 is 43001501512.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21510509987 and 21510510014.

It is not an unprimeable number, because it can be changed into a prime (21510510037) 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, 7069 + ... + 207535.

It is an arithmetic number, because the mean of its divisors is an integer number (2172271248).

Almost surely, 2^21510510034 is an apocalyptic number.

21510510034 is a deficient number, since it is larger than the sum of its proper divisors (13245829934).

21510510034 is a wasteful number, since it uses less digits than its factorization.

21510510034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204609.

The product of its (nonzero) digits is 600, while the sum is 22.

The spelling of 21510510034 in words is "twenty-one billion, five hundred ten million, five hundred ten thousand, thirty-four".