20426261061531 has 16 divisors (see below), whose sum is σ = 29331229372704. Its totient is φ = 12569486740224.

The previous prime is 20426261061461. The next prime is 20426261061571. The reversal of 20426261061531 is 13516016262402.

It is not a de Polignac number, because 20426261061531 - 2¹³ = 20426261053339 is a prime.

It is a super-2 number, since 2×20426261061531² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 20426261061531.

It is not an unprimeable number, because it can be changed into a prime (20426261061571) 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, 9878946 + ... + 11766311.

It is an arithmetic number, because the mean of its divisors is an integer number (1833201835794).

Almost surely, 2^{20426261061531} is an apocalyptic number.

20426261061531 is a deficient number, since it is larger than the sum of its proper divisors (8904968311173).

20426261061531 is a wasteful number, since it uses less digits than its factorization.

20426261061531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21669470.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 20426261061531 in words is "twenty trillion, four hundred twenty-six billion, two hundred sixty-one million, sixty-one thousand, five hundred thirty-one".