20216244540 has 48 divisors (see below), whose sum is σ = 56630835072. Its totient is φ = 5388584256.

The previous prime is 20216244539. The next prime is 20216244541. The reversal of 20216244540 is 4544261202.

It is an interprime number because it is at equal distance from previous prime (20216244539) and next prime (20216244541).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 20216244498 and 20216244507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20216244541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61707 + ... + 210333.

It is an arithmetic number, because the mean of its divisors is an integer number (1179809064).

Almost surely, 2^20216244540 is an apocalyptic number.

20216244540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20216244540 is an abundant number, since it is smaller than the sum of its proper divisors (36414590532).

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

20216244540 is a wasteful number, since it uses less digits than its factorization.

20216244540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150906 (or 150904 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

The spelling of 20216244540 in words is "twenty billion, two hundred sixteen million, two hundred forty-four thousand, five hundred forty".