21541402510 has 32 divisors (see below), whose sum is σ = 39275282592. Its totient is φ = 8505459840.

The previous prime is 21541402469. The next prime is 21541402529. The reversal of 21541402510 is 1520414512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1016220 + ... + 1037200.

It is an arithmetic number, because the mean of its divisors is an integer number (1227352581).

Almost surely, 2^21541402510 is an apocalyptic number.

21541402510 is a deficient number, since it is larger than the sum of its proper divisors (17733880082).

21541402510 is a wasteful number, since it uses less digits than its factorization.

21541402510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22308.

The product of its (nonzero) digits is 1600, while the sum is 25.

The spelling of 21541402510 in words is "twenty-one billion, five hundred forty-one million, four hundred two thousand, five hundred ten".