20741439628 has 72 divisors (see below), whose sum is σ = 47561828832. Its totient is φ = 7722703872.

The previous prime is 20741439617. The next prime is 20741439637. The reversal of 20741439628 is 82693414702.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48475 + ... + 209362.

It is an arithmetic number, because the mean of its divisors is an integer number (660580956).

Almost surely, 2^20741439628 is an apocalyptic number.

20741439628 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20741439628 is an abundant number, since it is smaller than the sum of its proper divisors (26820389204).

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

20741439628 is a wasteful number, since it uses less digits than its factorization.

20741439628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257891 (or 257876 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 20741439628 in words is "twenty billion, seven hundred forty-one million, four hundred thirty-nine thousand, six hundred twenty-eight".