20914503456 has 384 divisors, whose sum is σ = 70243891200. Its totient is φ = 5335925760.

The previous prime is 20914503409. The next prime is 20914503457. The reversal of 20914503456 is 65430541902.

It is a super-2 number, since 2×20914503456² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20914503457) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 59926770 + ... + 59927118.

It is an arithmetic number, because the mean of its divisors is an integer number (182926800).

Almost surely, 2^20914503456 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20914503456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35121945600).

20914503456 is an abundant number, since it is smaller than the sum of its proper divisors (49329387744).

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

20914503456 is a wasteful number, since it uses less digits than its factorization.

20914503456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The spelling of 20914503456 in words is "twenty billion, nine hundred fourteen million, five hundred three thousand, four hundred fifty-six".