21877003490 has 32 divisors (see below), whose sum is σ = 40969027584. Its totient is φ = 8401821120.

The previous prime is 21877003487. The next prime is 21877003501. The reversal of 21877003490 is 9430077812.

It is a Curzon 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, 238469 + ... + 317208.

It is an arithmetic number, because the mean of its divisors is an integer number (1280282112).

Almost surely, 2^21877003490 is an apocalyptic number.

21877003490 is a deficient number, since it is larger than the sum of its proper divisors (19092024094).

21877003490 is a wasteful number, since it uses less digits than its factorization.

21877003490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555842.

The product of its (nonzero) digits is 84672, while the sum is 41.

The spelling of 21877003490 in words is "twenty-one billion, eight hundred seventy-seven million, three thousand, four hundred ninety".