21053011040 has 48 divisors (see below), whose sum is σ = 49907603088. Its totient is φ = 8392444416.

The previous prime is 21053010991. The next prime is 21053011079. The reversal of 21053011040 is 4011035012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177662 + ... + 271421.

It is an arithmetic number, because the mean of its divisors is an integer number (1039741731).

Almost surely, 2^21053011040 is an apocalyptic number.

21053011040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21053011040 is an abundant number, since it is smaller than the sum of its proper divisors (28854592048).

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

21053011040 is a wasteful number, since it uses less digits than its factorization.

21053011040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449391 (or 449383 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 21053011040 its reverse (4011035012), we get a palindrome (25064046052).

The spelling of 21053011040 in words is "twenty-one billion, fifty-three million, eleven thousand, forty".