21350153020 has 48 divisors (see below), whose sum is σ = 51249235968. Its totient is φ = 7318785600.

The previous prime is 21350152987. The next prime is 21350153023. The reversal of 21350153020 is 2035105312.

It is a junction number, because it is equal to n+sod(n) for n = 21350152982 and 21350153000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21350153023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1187095 + ... + 1204945.

It is an arithmetic number, because the mean of its divisors is an integer number (1067692416).

Almost surely, 2^21350153020 is an apocalyptic number.

21350153020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21350153020 is an abundant number, since it is smaller than the sum of its proper divisors (29899082948).

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

21350153020 is a wasteful number, since it uses less digits than its factorization.

21350153020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26410 (or 26408 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 22.

Adding to 21350153020 its reverse (2035105312), we get a palindrome (23385258332).

The spelling of 21350153020 in words is "twenty-one billion, three hundred fifty million, one hundred fifty-three thousand, twenty".