21989503134 has 32 divisors (see below), whose sum is σ = 48882608640. Its totient is φ = 7327277496.

The previous prime is 21989503121. The next prime is 21989503147. The reversal of 21989503134 is 43130598912.

It is a happy number.

21989503134 is a `hidden beast` number, since 2 + 1 + 9 + 8 + 9 + 503 + 134 = 666.

It is an interprime number because it is at equal distance from previous prime (21989503121) and next prime (21989503147).

It is a self number, because there is not a number n which added to its sum of digits gives 21989503134.

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, 88497 + ... + 227619.

It is an arithmetic number, because the mean of its divisors is an integer number (1527581520).

Almost surely, 2^21989503134 is an apocalyptic number.

21989503134 is an abundant number, since it is smaller than the sum of its proper divisors (26893105506).

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

21989503134 is a wasteful number, since it uses less digits than its factorization.

21989503134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142061 (or 142055 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 21989503134 in words is "twenty-one billion, nine hundred eighty-nine million, five hundred three thousand, one hundred thirty-four".