20262567481 has 12 divisors (see below), whose sum is σ = 22006292412. Its totient is φ = 18648354816.

The previous prime is 20262567449. The next prime is 20262567503. The reversal of 20262567481 is 18476526202.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 8048781225 + 12213786256 = 89715^2 + 110516^2 .

It is not a de Polignac number, because 20262567481 - 2⁵ = 20262567449 is a prime.

It is a super-2 number, since 2×20262567481² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20262567431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120936 + ... + 234841.

It is an arithmetic number, because the mean of its divisors is an integer number (1833857701).

Almost surely, 2^20262567481 is an apocalyptic number.

It is an amenable number.

20262567481 is a deficient number, since it is larger than the sum of its proper divisors (1743724931).

20262567481 is a wasteful number, since it uses less digits than its factorization.

20262567481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356140 (or 356127 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 20262567481 in words is "twenty billion, two hundred sixty-two million, five hundred sixty-seven thousand, four hundred eighty-one".