20213520140 has 24 divisors (see below), whose sum is σ = 46307337552. Its totient is φ = 7350370880.

The previous prime is 20213520073. The next prime is 20213520233. The reversal of 20213520140 is 4102531202.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45939599 + ... + 45940038.

It is an arithmetic number, because the mean of its divisors is an integer number (1929472398).

Almost surely, 2^20213520140 is an apocalyptic number.

20213520140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20213520140 is an abundant number, since it is smaller than the sum of its proper divisors (26093817412).

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

20213520140 is a wasteful number, since it uses less digits than its factorization.

20213520140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91879657 (or 91879655 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The spelling of 20213520140 in words is "twenty billion, two hundred thirteen million, five hundred twenty thousand, one hundred forty".