20425155031 has 2 divisors, whose sum is σ = 20425155032. Its totient is φ = 20425155030.

The previous prime is 20425155013. The next prime is 20425155061. The reversal of 20425155031 is 13055152402.

Together with previous prime (20425155013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20425155031 - 2¹³ = 20425146839 is a prime.

It is a super-2 number, since 2×20425155031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20425155001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10212577515 + 10212577516.

It is an arithmetic number, because the mean of its divisors is an integer number (10212577516).

Almost surely, 2^20425155031 is an apocalyptic number.

20425155031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20425155031 is an equidigital number, since it uses as much as digits as its factorization.

20425155031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 20425155031 in words is "twenty billion, four hundred twenty-five million, one hundred fifty-five thousand, thirty-one".