20126251454 has 32 divisors (see below), whose sum is σ = 31640444640. Its totient is φ = 9591737472.

The previous prime is 20126251451. The next prime is 20126251493. The reversal of 20126251454 is 45415262102.

It is a super-2 number, since 2×20126251454² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20126251454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20126251451) 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, 1271372 + ... + 1287104.

It is an arithmetic number, because the mean of its divisors is an integer number (988763895).

Almost surely, 2^20126251454 is an apocalyptic number.

20126251454 is a deficient number, since it is larger than the sum of its proper divisors (11514193186).

20126251454 is a wasteful number, since it uses less digits than its factorization.

20126251454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16124.

The product of its (nonzero) digits is 19200, while the sum is 32.

The spelling of 20126251454 in words is "twenty billion, one hundred twenty-six million, two hundred fifty-one thousand, four hundred fifty-four".