20602140454 has 24 divisors (see below), whose sum is σ = 35954126208. Its totient is φ = 8828139600.

The previous prime is 20602140431. The next prime is 20602140457. The reversal of 20602140454 is 45404120602.

It is a super-2 number, since 2×20602140454² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20602140457) 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, 885312 + ... + 908284.

It is an arithmetic number, because the mean of its divisors is an integer number (1498088592).

Almost surely, 2^20602140454 is an apocalyptic number.

20602140454 is a deficient number, since it is larger than the sum of its proper divisors (15351985754).

20602140454 is a wasteful number, since it uses less digits than its factorization.

20602140454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32140 (or 32133 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The spelling of 20602140454 in words is "twenty billion, six hundred two million, one hundred forty thousand, four hundred fifty-four".