20535214040 has 64 divisors (see below), whose sum is σ = 50445054720. Its totient is φ = 7461360000.

The previous prime is 20535214027. The next prime is 20535214087. The reversal of 20535214040 is 4041253502.

It is a happy number.

It is a super-2 number, since 2×20535214040² (a number of 21 digits) contains 22 as substring.

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, 549965 + ... + 586115.

It is an arithmetic number, because the mean of its divisors is an integer number (788203980).

Almost surely, 2^20535214040 is an apocalyptic number.

20535214040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20535214040 is an abundant number, since it is smaller than the sum of its proper divisors (29909840680).

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

20535214040 is a wasteful number, since it uses less digits than its factorization.

20535214040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37464 (or 37460 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

Adding to 20535214040 its reverse (4041253502), we get a palindrome (24576467542).

The spelling of 20535214040 in words is "twenty billion, five hundred thirty-five million, two hundred fourteen thousand, forty".