20101553340 has 144 divisors (see below), whose sum is σ = 64556642304. Its totient is φ = 4661191040.

The previous prime is 20101553333. The next prime is 20101553347. The reversal of 20101553340 is 4335510102.

It is an interprime number because it is at equal distance from previous prime (20101553333) and next prime (20101553347).

It is a self number, because there is not a number n which added to its sum of digits gives 20101553340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20101553347) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 106789 + ... + 227171.

It is an arithmetic number, because the mean of its divisors is an integer number (448310016).

Almost surely, 2^20101553340 is an apocalyptic number.

20101553340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20101553340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32278321152).

20101553340 is an abundant number, since it is smaller than the sum of its proper divisors (44455088964).

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

20101553340 is a wasteful number, since it uses less digits than its factorization.

20101553340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120440 (or 120427 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The spelling of 20101553340 in words is "twenty billion, one hundred one million, five hundred fifty-three thousand, three hundred forty".