20276457520 has 40 divisors (see below), whose sum is σ = 51428471760. Its totient is φ = 7373256960.

The previous prime is 20276457503. The next prime is 20276457529. The reversal of 20276457520 is 2575467202.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×20276457520² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (20276457529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11519835 + ... + 11521594.

It is an arithmetic number, because the mean of its divisors is an integer number (1285711794).

Almost surely, 2^20276457520 is an apocalyptic number.

20276457520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20276457520 is an abundant number, since it is smaller than the sum of its proper divisors (31152014240).

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

20276457520 is a wasteful number, since it uses less digits than its factorization.

20276457520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23041453 (or 23041447 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 40.

The spelling of 20276457520 in words is "twenty billion, two hundred seventy-six million, four hundred fifty-seven thousand, five hundred twenty".