20751431394 has 8 divisors (see below), whose sum is σ = 41502862800. Its totient is φ = 6917143796.

The previous prime is 20751431387. The next prime is 20751431401. The reversal of 20751431394 is 49313415702.

It is an interprime number because it is at equal distance from previous prime (20751431387) and next prime (20751431401).

It is a sphenic number, since it is the product of 3 distinct primes.

20751431394 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1729285944 + ... + 1729285955.

It is an arithmetic number, because the mean of its divisors is an integer number (5187857850).

Almost surely, 2^20751431394 is an apocalyptic number.

20751431394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20751431394 is a wasteful number, since it uses less digits than its factorization.

20751431394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3458571904.

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 20751431394 in words is "twenty billion, seven hundred fifty-one million, four hundred thirty-one thousand, three hundred ninety-four".